Professional recording pen chip of ATJ3315D, HD recording Timestamp, automatically name recording files by date AGC function, automatically adjusts noise source Voice recorder, MP3 player, and USB flash drive Supports voice-activated recording Detects low battery and automatically saves recording files Playback function: one key to record/save Plug in headphones to listen to music USB adapter included Long battery life Built-in rechargeable 150mAh lithium battery USB 2.0 connector for easy file upload and download Recording format: WAV at 192kbps Music playback formats: WMA, WAV, MP3, OGG, and other audio formats Battery recording time: approximately 15 hours Battery playback time: approximately 10 hours Battery charging time: approximately 2 hours Signal-to-noise ratio: 80dB USB interface: USB 2.0 high speed 16GB storage supports approximately 188 hours of recording Operating temperature: -5C to 40C Recording sample rate: 48kHz Headphone jack: USB jack Compatible with Windows 2000 and above systems Color: Black Material: Plastic Package contents: 1 x Mini Recorder Note: Light reflection and different displays may cause slight color variation between the item and the image. Measurement error allowed within +/- 1-3cm.