Make sure you have at least Firmware version 1.2.0 installed. If not, download it here BATLOGGER M2
The M2 has a default balanced trigger sensitivity. This is used in the default Explore setting for example. This should have a good immunity to noise while conserving most bat calls. It is recommended for general use in common environments.
If you don’t want to miss any bats and don’t care if there are some noise recordings, you can set your BATLOGGER M2 to high sensitivity with a custom recording profile.
Follow these steps to create a new custom profile: