Features Voice activated sensor built-in:It automatically starts recording when sound is detected and you can avoid long hours of silents recordings. One button operation: Extremely easy to use. Only one-on/off button - just switch the button to on position. It can be operated by less experienced users. During the recording no light will be on. The most resourceful: And amazing solution if you have questions about doubting actions that affects your person, family or business your partners, kids, maid or employees activity or for interviews, ideas, meetings, etc Integrated mp3 player with headphones: In addition to its voice recorder function, this device also serves as an mp3 player. Simply plug in the included headphones to enjoy your favorite tracks anytime. Mini portable: Black recorder, super small size, not easy to be found. Suitable for meetings, interviews, etc Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: 45x17x5mm Package List: 1 Set Slim Micro Voice Recorder