Once you turn on the power button, the mini voice recorder begin recording the sound around. The sensitive chips detect sound and omnidirectional microphone capture voice nearby.
When you turn on activation mode (push the AVR button up), the voice activated recorder will stop recording while noise is lower than 45 db. This will save much of your time when listen to the playback.
Comes with an earphone for you to listen to the playback at any time without connecting to PC.