Noise reducing voice recording. Smart voice activated recording. No light,no sound. when it is recording, there is no sound and no light. Easy to use: one click recording, one click saving the recording. timestamp: the recording files will be named with time and date. USB Flash driver functions: this recorder can be connected with computer, so that we can copy the audio files from this recorder. MP3 Player: it can be used as mp3 player, we will send it with the earphone, which is good to listening music. Long working time: 21hours Continuous recording time,95hours(voice activated recording time) Small size and light weight. Colour:Black Material:Aluminum alloy Capacity:4G/16G/8G Package Contents: 1x Digital Voice Recorder 1x Charging Cable 1x Headphone 1x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.