1.Built-in microphone.Plug And Play Support U disk function 2.Rechargeable Li-ion battery,Battery time: about 13 hours 3.The voice recorder a long play recording mode,Telephone recording function allows you to record detailed conversations 4.This digital voice recorder supports Windows XP/Vista/7/8/10 5.This digital recorder with OTG function and noise reduction Flash Memory:8GB(Please select FAT32 system when formatting the recorder) Recording time:About 70 hours Recording Formats:WAV Power Supply:Li-ion battery Operating SystemWindows XP/Vista/7/8/10 USB Port:USB 3.0 Frequency Response:20Hz-20KHz Working Temperature:0~40Celsius Colour:black Material:ABS Size:70x21x9.4mm Package Contents: 1 x Voice Recorder Only the above package content, other products are not included. Note: Light shooting 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.