The lowest frequency we have tested the device at is 16KHz.

If using rechargeable batteries, they do degrade over time, and after tens or hundreds of cycles (dependant on lots of factors, including chemistry, temperature and even manufacturer) they will have a lower capacity.

If using non-rechargeable batteries, note that most will vary wildly in capacity. Different manufacturers using different chemistries, ways that the batteries are stored, and when they were manufactured all have an impact.

This is a common issue that can mean many things, but more often than not is a dirty SD card, or SD card slot. Ensure that the SD card is clean, and dry before insertion. Check the SD card slot for dirt as well.

Other options include a corrupt SD card, or no space left on the SD card. It may also be formatted wrong.

A broad question, but the simple answer is it depends!

If you are recording audible animals such as birds for AI classification, the most common sample rate is to 48KHz, and recorded as continuous. Usually on some sort of timed schedule.

If you are recording bats, or insects, you will likely want 384KHz. This is perfect to team with the BTO pipeline. This is generally set as triggered, so you don’t fill the SD card too quickly.

This is decided by a few factors, sample rate, recording length is the main one. We are creating a calculator to help estimate this. It can be difficult to estimate for triggered recordings as it depends how many times it is triggered.

A very difficult question. It depends on the case being used, where it is located, and event the actual device used. Every microphone has a slightly different sensitivity. We estimate somewhere between 10 and 25m, which is comparable to most devices on the market.