The default sample rate is 48 kHz and so you will see frequencies up to 24 kHz. To record bats, you will probably need a sample rate of 192 kHz. You can change the sample rate and the schedule using the Configuration App (the CONFIG.TXT file is an output summary of the settings, rather than the configuration file). This will also set the time so that the files will have the correct time stamp.
The default sample rate is 48 kHz and so you will see frequencies up to 24 kHz. To record bats, you will probably need a sample rate of 192 kHz. You can change the sample rate and the schedule using the Configuration App (the CONFIG.TXT file is an output summary of the settings, rather than the configuration file). This will also set the time so that the files will have the correct time stamp.
The guide here will talk through the most common settings: https://www.openacousticdevices.info/config-app-guide