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Sunday, March 18, 2018

Reviews Have Been (temporarily) Removed.

The blog will be undergoing some construction. So almost all of the Reviews will be temporarily unavailable.

Sorry for any inconvenience.

Happy bat detecting!

Wednesday, March 7, 2018

Status Update & New Batseeker 4

Some recent happenings here...

The first bat detector, to be reviewed for 2018 has arrived - It's The Batseeker 4, the latest offering from Batseeker.


New Batseeker 4

I am planning to update and revise some of the existing bat detector reviews, here on the blog. Less than a handful (of the more recent ones). The final reviews will be a lot more detailed, but they won't be on this blog.
More about this later...

I'm looking forward to multiple field trips this Spring. There may also be an opportunity to test and review some visual recording equipment; possibilities include: Night vision, FLIR systems, and rigid endoscopes.

Wildlife & Countryside Services carries a lot of equipment.

Happy bat detecting!


Tuesday, January 30, 2018

Review Of The Batseeker 3 - Entry Level Bat Detector


An early version of The Batseeker 3. This is before the loop was added.

This review will deal with The Batseeker detectors (Versions 1 to 3) but be advised, that the latest version, The Batseeker 4 is the unit which is currently available.

The units are just over 14 cm in length, and are very light in weight. As can be seen on this video clip made by Batseeker.

The price of the unit, is it's most attractive feature: At only $44.99 with free shipping to the U.S. and Canada; it's the lowest cost bat detector currently available anywhere.

Back of the early Batseeker 3, speaker is visible.

The Batseekers are Frequency Division bat detectors, and are designed from lightweight black plastic.
These detectors are constantly being improved, in many different ways - Which is great news! 
For just one example - The latest Batseeker 4 is now constructed using higher quality PVB plastic.

The Batseeker 3 was very simple to use: It consists of just one On/Off switch!
In it's latest rendition, The Batseeker 4: There are convenient new buttons on the back, allowing a user to easily control speaker output volume. Another significant improvement, is the addition of a new amplifier stage.

A later version of The Batseeker 3. The case loop is just visible on the right.

The Batseeker is ideal for those wanting to try bat detecting, without investing too much money. I would recommend it for first-time buyers who are looking for the least expensive bat detector available. Also very good for children - with supervision - because the Batseeker(s) will get damaged if dropped on hard surfaces outdoors.

Back view of The Batseeker 3, showing open battery compartment.

The process of using it, consists of turning it on, and pointing the side with the microphone hole (now indicated by orange paint) towards the area of suspected bat activity.

Pros: 

  • It is the lowest cost bat detector currently available.

  • Small and slim in size, easily portable.

  • It may be powered with 2 standard AAA sized batteries. However, Sanyo eneloop rechargeable NimH are highly recommended for best performance.



Cons:

  • Lightweight plastic construction may be easily damaged (if dropped on a hard surface, etc.).
  • No algorithms in place to distinguish between biological and man-made sounds (all ultrasounds are detected).

The Batseeker 4 may be ordered from several sources:



The units are very quiet (practically zero background noise!), and well-suited to static / un-attended recording. Simply turn on, and point microphone side out (on a windowsill, for example). 
In the recent past, I've had fun using Batseekers to record bat sounds on (low-light) video clips. My attempts didn't produce great results, (I used a low-cost tablet, and a point & shoot camera at the time). When I edit the (fair quality) recording(s), I'll add them to this review.
This year, I'll have infrared camera(s) available, so watch this spot for updates... 

As the weather begins to warm here in New York, I'll have an opportunity to record some additional bat calls. Using an audio cable this time - All Batseeker detectors feature a (3.5mm [mono]) audio out jack; and I'll add the resulting recordings to this review.

So at a cost of only $44.99 U.S. dollars, you now have virtually no excuse not to try the awesome hobby of bat detecting!

And, finally - I've recently been informed, that I will have an opportunity to test and review the latest Batseeker 4 soon!

Happy bat detecting!

Sunday, January 28, 2018

Review of The SongMeter SM4BAT FS from Wildlife Acoustics

Review of The SM4BAT FS SongMeter from Wildlife Acoustics

Note: This review will be updated further, over the next few weeks (with extra details, spectrograms, etc.)

The SM4BAT is the latest SongMeter system, available in both full-spectrum and zero-crossing models, from Wildlife Acoustics. It is a ultrasonic bat recorder, designed to be used as a passive/unattended recording solution.

It's a single channel recording system, which is both lightweight and compact. And has the ability to be left unattended, for long periods of time (up to 45 days!).

A very concise overview of this new unit, may be seen on the manufacturer's page Here.

The SM4BAT arrives double-boxed and very well packaged. In other words, the product box is protected by air-filled cushions (as well as bubble wrap).


The unit's dimensions are as follows:

Height: 8.6" (218 mm)  Width: 6.0" (152 mm)  Depth: 3.1" (78 mm)
1.6 lbs / .7 kg without batteries, 2.9 lbs / 1.3 kg with batteries


I can also state, that no less than 9 of them will fit into an ordinary backpack.

As per Wildlife Acoustics' Web site:

"The new, low-power microprocessor, combined with 4 D-size batteries, enable the longest deployment times of any other bat recorder available. The SM4BAT FS has a recording run time of 250 to 450 hours (e.g. 25-45 10-hour nights) depending on bat activity and other factors."

There are several features which make this bat detecting system desirable:

  • It's particularly well-suited for those in need of unattended monitoring/recording of ultrasounds; especially bat activity. 
  • It is capable of recording an unprecedented number of bat passes - up to 45 nights! directly across multiple (up to 2) SD cards. 
  • It's very easy to use, and no PC is needed for the set-up, or actual recording.
The new SMM-U2 microphone's low noise and superior sensitivity, makes it an excellent addition to this Song Meter system. More on this Mic later...

The Song Meter SM4BAT is designed using very heavy-duty poly-carbonate, which is impervious to extreme weather conditions. It was definitely designed with the needs of Ecologists in mind.


As with it's predecessors (earlier Song Meter systems) it is very easy to set-up and use.


The SM4BAT FS may be purchased directly from The Wildlife Acoustics page Here.


As always, the Customer Service/Support aspect of Wildlife Acoustics: In a nutshell, their Technical Support is second to none.


This new SM4BAT FS has proven to be excellent for my nightly recordings.


Another neat attribute of the SM4BAT I like, is how the microphone units are protected.  Using a well-secured, dark gray foam. In the printed materials provided, Wildlife Acoustics explains just how waterproof their SM4BAT platforms are. As in the past, they also provide tips and best practices for outdoor deployment. 

The Song Meter SM4BAT has been designed with great pick-up range. There is a PCB mounted, 3.5mm earphone jack located inside the SM4BAT's enclosure. This is provided so that one can listen to the sound input while recording; this may be used for live monitoring, to check the status of microphone(s), perform test recordings, etc.

No tools are required to open the unit.
With the top cover snapped back on, in preparation for mounting/deployment - The green LED light will be visible to you, via a built-in diffuser. So that you can get feedback before, during, and after the unit is mounted:
- A steady, repeated blinking: Indicates the unit has started it's scheduled recording. This informs you that the system is awake, and is actively monitoring.



The installation and configuration of the SM4BAT is a very easy process.
Just install batteries - 4 D cells (Energizer brand recommended), a Class 4 SD memory card, and you're more than halfway done.  


Some of the other main features are: The LCD display - Which is easy to read, and will help you set all device options.
Among the main things you might want to do are:
- Set the Record Start and Stop times, set the internal clock.
- Adjust Sensitivity values which you can use to fine-tune the level for the triggering.
There are a few other things, which you will learn all about from the User Guide; which happens to be one of the best I've ever seen.

It has been a pleasure to use. And thanks to Wildlife Acoustics' Kaleidoscope software: The analysis of bat recordings has been a breeze ever since! I've got lots of recorded bat calls to listen to, and create various sonograms with.


The SM4BAT happens to be the approximate size of other comparable unattended recording solutions. In fact, it is a bit smaller than some. It is easily portable, fitting one (along with accessories, etc.) into a backpack is effortless. Without batteries installed, the unit is very light. 
As previously stated - The fact is, you can fit 9 of these units in a typical backpack (with room to spare).

Sensitivity and filtering are fully adjustable, across the spectrum of the unit's abilities.


The fact that the unit can be used as a "Set-and-forget" recorder (for up to 45 days) is a plus.
The unit is very economical; especially when compared to similar systems which are currently available.

The Kaleidoscope software, from Wildlife Acoustics is very versatile; and produces nice-looking (and informative) sonograms.

With the great help/suggestions and support I received from the Folks at Wildlife Acoustics, I ended up with a diverse collection of recordings. The nice thing about it, is that I was able to test a lot of different variations of settings. In a short period of time.  


You can basically go either way, in your approach to the use of this system: You may choose to rely mostly on the default settings - And take a more simple approach (which is exactly what I did in the beginning of the test period). Or, you may be the type who enjoys tinkering & experimenting. In which case, you'll find a fair number of combinations, for customizing preferences.


Happy bat detecting!

Thursday, December 8, 2011

Wildlife Sound Recording Society - Autumn 2011 Journal

From England - The Autumn issue of The WSRS's Journal is out now. It is another feature-packed, fascinating issue.


This volume (Vol. 12 No. 2) includes great articles - Including my reviews of:
SeaWave Software (Page 7)
Dodotronic's Ultramic 200K (Page 12)
And a great article by Chris Scott, titled 'Sound Surveys Yield Secrets Of Bat Swarms'
(Page 38)

There really are lots of other great reviews & articles in this volume!


I'll admit, that the yearly Subscriptions/Membership fee is not cheap (for USA residents); but I can tell you - It is totally worth every penny!

Monday, November 14, 2011

Review: The SSF BAT2 Part 1 Of 2

The SSF BAT2, is manufactured by Microelectronic Volkman, and distributed by All About Bats  This bat detector has lots of awesome (and very useful) features!
I'll start at the beginning...
The review sample of the new SSF BAT2 detector arrived very well packaged; safe and sound to me here in the U.S. from Germany.extremely well-packaged. 
The detector was very well protected. Multi-boxed, including a foam-lined inner section.  -See below:


The next item to catch my eye, was the beautiful carry case it comes with! Wow! Really nice, there is even a compartment in the front, that can hold an extra set of (4) AA-size batteries. It features a belt loop, and very secure Velcro flap. I like the case a lot!
For a while, All-About-Bats.net was offering the case free; with the purchase of an SSF BAT2 - So, hopefully some of you were lucky enough to order one while the special offer was in effect.
The unit is provided with: The attached, adjustable wrist strap; a full printed manual in German. I had printed out the English version of it (even before it arrived!)

Here are some Links, to get you started:

MEKV - In German

Links to the User Guide PDF, in both (Orig.) German; and English:

The SSF BAT2 - All About Bats (Original German)

The SSF BAT2 - All About Bats (English)

From the beginning, it's hard not to like this detector! Upon powering up and checking/testing this instrument: You will notice the incredible sensitivity and range; as well as the precision of it's Volume control. These are simply the two main features that I noticed first.

This bat detector has quite a bit of "Wow factor" - Which is nice, at this price point. I really like it's features! This bat detector is very easy and fun to use!
I believe that a major reason for this, is that this unit is really two bat detectors-in-one. When switched on: The frequency division portion of the unit is always on, and "scanning" the air space in front of it -Constantly displaying the detected frequency. At any time, the heterodyne portion of the detector can be instantly tuned, to the frequency being displayed - Simply by pressing one button. Very cool!
Of course, you have full control of the heterodyne portion of the unit, at the same time. Most would say, the main category into which this detector fits, would be heterodyne. That is it's main mode of operation.
First impressions were great! The frequency range of this unit, is 15 to 130kHz. I really liked the sensitivity of the unit, and the audio output of the speaker is very good.
In Part 2 of this review: There will be more photos, and I'll cover more features and performance of this detector ...

Where to buy:

All About Bats

NHBS

This Link (translated to English, by BabelFish) has enough free download-able goodies to keep you busy for a while! I like it!

SSF BAT2 Review Part 2 Of 2

Sunday, November 13, 2011

Weather Conditions Conducive To Bat Detecting

It has been written in several books (and various other texts/scientific papers), that bats will not (or are very unlikely) to be detected if certain weather conditions exist. This seems to be especially likely, if the guide you are reading, is a bit outdated.

The typical generalizations (or guidelines) have stated, for instance: That bats will not take flight, or leave their temporary (or permanent) roosts, unless the outdoor temperature is at least 50 Deg. F. Those of you who (like me) read all the bat books, texts, and scientific papers that you can get your hands on; will have also read: That bats will not fly if it is too windy, or raining.
To put it nicely: Many of us have already discovered that these guidelines (or "Rules") are incorrect. The interesting thing, is that many modern documents also echo these guidelines.

I've found that a fascinating (and fun) activity, is to actually set-out to prove that these recommendations are incorrect. So, if possible - Place one of your detectors out if:
 Temperatures are below 50 degrees Fahrenheit
 It's raining lightly - And you're able to do so without getting the unit wet - Please make sure that your detector's microphone element doesn't get wet!
 It's windy...Not too windy, mind you! Bats certainly will not fly if winds are over 15mph.
Remember to take notes! - Especially if you get any recordings of bats.

Together, we hobbyists will be able to prove a lot of those old texts wrong. And, be able to share new (and interesting) findings/updates. I keep a separate journal (notebook) especially for this purpose. I have already proven that the 50 Deg. F "rule" is not accurate : )

For intermediate or advanced hobbyists:
There is something else. Especially during this Winter - If you capture bat recordings at night, or at dusk/dawn; and it happens to be the "dead of Winter" - It would be good, to try to positively verify the species. This may be done, using the usual/conventional means: Studying various facets of the recordings, studying/comparing the resulting sonograms, etc.

If for instance, you determine that the species recorded; are of a type that should positively be hibernating at that date/time. There is a possibility, that you have picked up bats that are suffering from WNS. Of course, this is a very sad topic for most of us. Depending on your situation, location, (and perhaps other variables) you may be able to share your findings with your local Wildlife Authorities. You may even be instrumental in saving the lives of some bats.
Just keep in mind, that there are some bat species, which are known to be active (even in December) and it is not abnormal. You'll have to use your discretion.

Happy bat detecting!

Wednesday, November 2, 2011

Some Opinions & Info Recently Shared With Some Readers (Via e-mail)

I received a few questions recently, from some beginning Hobbyists; and others who are new to bat detecting equipment. So, I'm passing along some of the information I shared, and the suggestions I offered.

Detector Recommendations, Responses To E-Mails , And Other Tips:

The new SSF BAT2, is a fantastic detector, that has excellent sensitivity and range It's reasonably priced - And is a lot of fun to use! The review of this one, is still "in the works"...But will be posted up here soon. Have a look at this great unit (I love the display):


In regards to Dodotronic's Ultramics:

I believe that the Ultramic may be useful, for your application - For more info, in regards to the Ultramic, from Dodotronic:
You may also want to have a look at the Forum discussion that took place here: http://www.forumbretagne-vivante.org/t2751-micro-ultrasons-usb
A lot of the posts are in French - Just scroll down, until you see the post in English, written by Ivano of Dodotronic.
You'll have to disregard the mention of it's ability to do unattended recording - As this feature has not been implemented into the SeaWave software yet. In fact, that functionality may be added to the SeaPro software.
The Ultramics do need to be connected to a computing device of some sort. When hooked up to a laptop, netbook, or Tablet PC, the Ultramic works very well.
The way I see it, when it comes to the Ultramic - Is this: If you will be recording in a place where substantial numbers of bats are pretty much "guaranteed" (Pond, Lake or Stream/River) then; the Ultramic would be good. - But, it does pick up and record other ultrasounds as well. Any sound (or noise) that resonates in (or close to) the ultrasonic spectrum will be picked up.
It would not be my first choice for un-attended recording.

If your budget allows, I would recommend the D240X. As it allows you to listen to the both the Heterodyne, and the TE activity that is going on at the same time (using any stereo earphones). You can hear the Heterodyne sounds in one ear and the TE activity in the other, simultaneously. With a digital stereo recorder, you'd be all set.
I was very fond of that unit during my testing and review period. One of the things that I noticed, was the noise-free recordings I got (using the D240X & a Zoom H1 Stereo recorder). The TE recordings were very clean (no background noise). Even the heterodyne recordings were clean.

The D240X on bat walks - The neat thing is, you can plug the recorder into the Tape jack, to capture (record) any triggered events; -and- listen to the heterodyne portion over the speaker at the same time.
Folks in attendance, will be able to hear the live bat activity (while you are recording it). The speaker Volume setting has no effect on the recordings. Excellent.
The only issue here, would be the higher cost...
As I mentioned on a previous post: The very lowest cost I've seen them for, (New) was $1499 US.

The Ciel CDB 305 Dual Bat Detector looks OK - It's not a terrible choice. However, relying on the printed knob tuning won't be extremely accurate.

Something with a digital readout would be ideal (and accurate).
A unit like the BatBox Duet would be excellent, but it is not cheap -http://batbox.com/duet.asp

Having said that; if cost is a major consideration - I would recommend the following unit:
The BatBox Baton (an outstanding performer - and cheap!).
In any case, with a simple digital recorder - It's very portable. Try to get the shortest stereo cable you can find (with 3.5mm plugs on each end). You'll be able to travel all over (and all night) making FD recordings.
A blog post, regarding cables and other small accessories will be coming up in the not-too-distant future.
The resulting frequency division recordings produced, will be a good starting point - In regards to analyzing the calls and creating sonograms. And, let's keep in mind that the Baton comes with a CD containing the Batscan software! Which I like very much, for creating sonograms, etc. As a side note: BatBox Ltd.'s Batscan software is very similar to the (no-longer-available) Spectrogram 16 software.

The resulting FD recordings will be useful. And you'll be able to analyze them, etc.

Well, I hope that helps. I'm probably forgetting something!
Happy bat detecting!
-Al

Sunday, October 23, 2011

Serious Bat Call Analysis Software

Well, Folks, judging by some of the recent e-mails I've received - It looks like I'm going to need to focus my attention on bat call analysis software. I was actually planning to, but was going to wait until at least mid-Winter. As, I fully expected to have FUN recording quite a few more bats, especially Red Bats! And, perhaps even another "surprise" species or two?...

Let's see here - The software packages whose names kept "popping up" (mentioned by interested readers) so far, have been: BatSound, and SonoBat
Both are regarded as excellent software programs for Professionals, as well as dedicated Hobbyists. As with most things, the really good stuff isn't cheap.

In any case, after some recent correspondence with other Hobbyists - I'm beginning to realize that it is time for me to consider investing in a good analysis program.
Also, there are some interesting Free applications available, for Bio-acoustic analysis. I may look into a couple of them, test, and report my findings.

For the most part, I use Audacity (which is free) and Bat Scan, which is very reasonably-priced software, from BatBox, Ltd. in the UK.

While I'm on the subject...
I've been meaning to post some of my thoughts and ideas, on good activities for bat hobbyists; for the "dead of Winter" (as in, January, mainly). For the month of January, in the Northeastern United States for instance: We have pretty much zero bat activity : (
So, it's a good time to focus our attention on things like:

* Becoming well acquainted with, and experimenting with, bat call analysis software.
* Going through (sorting out) all of the recordings collected from earlier in the year.
* And, of course: Analyzing, organizing and archiving the recordings (and sonograms, etc.)

Happy bat detecting!

Thursday, October 20, 2011

Added A Section For Bat Organizations

Just a quick post, to let you know, that I've added a place (on the right-hand side of the main page) for Links to Bat organizations. I received a note from a reader recently, who made me aware of this organization; and their upcoming events: North American Society For Bat Research I've still got a lot more to add. There are so many great Bat Conservation Organizations...all over the world...
{Also, for those who might be interested, this blog (that is, Bat Detector Reviews) gets approximately 1,930 Visitors per month.}

Here is a site (from Sweden) that I've been getting some traffic from recently, so I thought I'd post it up here (for those who speak Swedish) - And for those (who, like me) enjoy poking around foreign sites: Here's the link I usually "click around" on: http://www.chiroptera.se/tips.html And, here is the Main page: chiroptera.se
Well, no, it's not very easy when you don't know the language...and when BabelFish (and other) services cannot translate for you... But: If it has anything to do with bat detecting, then I'm there!

Until next time...

Wednesday, October 19, 2011

Recent Visit To Bartow Pell Mansion - And, Other Miscellaneous Things...

What follows, is the "debriefing" of my recent visit to Bartow Pell Mansion:
Unfortunately, there weren't many bats recorded: We are getting pretty close, to the end of the season for the majority of our local bats here. I'm still sorting through the recordings made on The Griffin, so there is a chance that I did pick up (an unseen) bat... If so, I will add the sonogram(s) to this post.
-But- I did end up recording a nice assortment of singing insects. That was great!
Yes, one of my other major hobbies is recording singing insects - But - In the interest of those who are interested only in bats; I've kept the subject (and recordings) of insects, out of this blog. I'm sure most Folks prefer it that way. The subject of recording singing insects would definitely need it's own blog!

I can tell you, that The Batbox Griffin and the SSF2 BAT were a pleasure to use in the field!  Dodotronic's Ultramic200K was great, too! (set up on a tiny tripod)

For now, you can have a look at a short video I took of the area. This is behind the mansion. You can hear the water fountain (pond) in the background, among the sounds of singing insects:


Remember, The Griffin Review isn't finished yet...and the SSF2 BAT Review will be coming up soon...

Happy bat detecting!

Thursday, October 13, 2011

The Next Detector To Be Reviewed: The SSF BAT2 Detector!

The next bat detector I'll be reviewing, will be The SSF BAT2. This detector is really neat!

Here is a quick snapshot I took, while on the trip to Bartow Pell Mansion. Pictured, from left to right, are: The SSF BAT2, The Batscanner from Elekon and the Griffin from BatBox (I apologize for the poor image quality):


Happy bat detecting!

Sunday, October 9, 2011

Future Site Of Bat Detecting Adventure - Bartow Pell Mansion

I haven't been on a bat detecting field trip in quite a while. This will be the awesome place I'll be visiting:


Bartow Pell Mansion

It is my favorite place to go Birding, and to photograph wildlife; during the day. It is also a very safe place (when it comes to 2-legged "predators"), which is also a big plus. I like to be able to focus all my attention on the fauna & wildlife while walking through the woods - Not having to be concerned with my own safety as well.
So, I requested (and was graciously granted) permission to visit the premises at night. I'm bringing some of the latest bat detectors that are currently "on the test bench". There's nothing like bringing new, cutting edge bat detectors on an "expedition" like this!

Among the instruments I'll be bringing are:

The Griffin, from BatBox Ltd.

The SSF2 BAT2 from BUND

The Ultramic200K from Dodotronic

The D240X from Pettersson Elektronik

A full "Debreifing" is forthcoming...

Review: The BatBox Griffin From BatBox, Ltd. (UK) Part 3 Of 3

Review: The BatBox Griffin Part 3 Of 3

Of course, as many of you are aware, The Griffin from BatBox experienced some delays prior to it's actual release. This was a disappointment to many bat enthusiasts, and especially to bat working Professionals. Only because many Pros were very anxious to try The Griffin!
When I log my bat recordings, I generally like to record:
The location, the date & time, and the weather conditions; including temperature and the current wind speed. One of the reasons for this: Is that quite a few texts & books written on the subject of Bats, mention the importance, and impact of wind on the flight behavior of bats. With The Griffin, time & temperature are recorded for you.



Above: The unit is in heterodyne mode (indicated by the 'HET' at the top of the screen)

In a recent e-mail I received, someone inquired as to the sample rate of this unit. The Griffin uses a sample rate of 705.6 kHz to accomplish it's time expansion detecting. But, makes the actual recording at a sample rate of 44.1 kHz (16-bit PCM).
As mentioned, in Part 2 of this review: There are many great updates and changes planned for The BatBox Griffin - As soon as these additional improvements are made, they will be described here, in detail.

*Update* 11/11/2011 *

The latest news I'd like to share, regarding The Griffin; is that I've gone ahead and updated the firmware on the system. Twice. In order to get the system up to the latest firmware version (V.20).
These firmware packages can be downloaded from the BatBox - Griffin Web page.

Very easy, and straightforward; each downloaded (zipped) package includes a Word (Text) document, which guides you through the process.

As with many computer-based instruments (as well as many PC systems themselves) the instrument must be updated in a progressive order. So, to get to Ver. 20, you must first successfully update to Ver. 18. (Ver. 19 did exist, but was for testing purposes only).
So, firmware version 18 was unzipped, and installed as per BatBox's instructions. The firmware upgrade process has The Griffin behaving just like a PC. The removable memory card is used to perform the upgrade. The process was finished in less than the 10 minutes stated in the accompanying instructions.

After completion, the unit reboots itself - The screen displays: A blinking cursor, followed by "Upgrade finished", and "Starting Griffin"
Although I knew that I'd be following up, right away, with the next firmware update: I wanted to do a bit of testing, following this upgrade. - As with most firmware updates - The issues addressed, improved features, and/or changes are listed by the manufacturer. What I found, in addition to these - was that the unit was even more sensitive than before! Awesome!
Next, was firmware version 20. All went smoothly, as above. This time, what I found, in addition - was that the unit was more responsive to input (such as pressing buttons, making selections, launching modes, etc.).
I was pleasantly surprised, and well-pleased. The Griffin from BatBox Ltd. is truly a brilliant machine.

Happy bat detecting!