4mm ultra-thin size, can be easily and conveniently put into wallets and pockets to record important sounds in life. With large memory and battery capacity, it has large-capacity recording storage space and can work for a long time. The recorder is made of zinc alloy material, which is durable and reliable to use. It has wide applicability and can be used for business, meetings, interviews, etc. It automatically records when there is sound and stops automatically when there is no sound, which can save memory and power. Product name: recorder Recording method: recording when powered on, storing when powered off Sampling rate: 48KHz Recording bit rate: 192Kbps Recording format: WAV Playback format: MP3, WMA, WAV Thickness: 4mm Headphone jack: 3.5mm Features: large capacity, stable performance, portable Colour:Black Material:plastic Memory: 8G/4G Package Contents: 1 x portable recorder 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.