Hardware Feature: Mini Portable Digital Voice Recorder Build in High Sensitivity Noise Cancelling Microphone, Memory Stick Micron 8GB High Speed Flash for High Quality Voice Record 36 Hours,High-Capacity Li-ion Battery Max Continuous Work to 12 Hours.Built-in text edit file, free to rewrite recording time, recording interval, voice control Settings, etc. *(Text edit file may be identified as a virus, please ignore!) How to operate: Switch to REC to turn on, the red LED light turns blue and flashes twice to enter the recording, the blue light turns off to start recording. Switch to STOP and the red LED light turns on once to save the Voie Files. note! The light does not light up during recording.Connect the computer to charge for 30 minutes before use, and check the disk space. Range of Use: Digital Voice Recorder Function Apply to Meeting, Students, Police, Journalists, Doctors, Lawyer, Musicians, Writers, Parents, Teachers etc. Use for Recreation,Conversations, Work and Study etc. USB Disk Function for All Office Busness and Copy and Storage Files Compatible Device: USB Perfect compatible with Windows OS and MAC(USB2.0),Android OTG,Voice Record WAV files Play with Windows Player and MAC VLC Media Player, And other support WAV files format Media Player.Note: Please select FAT32 format disk before using it for the first time