Features:1. Power switch/record switch.2.'+' volume plus/key for next song.3.'_'volume minus/mp3 music conversion key4. 3.5mmjack5. Work indicating lamp6. Lasting for about 48h for 4GB while continuously recording7. Recorded file in WMA/mp3 format8. High capacity9. Built-in rechargeable lithium battery10. USB storage write protection11. one-touch recording & high-quality recording12. Recording via high-grade built-in microphone13. Recording the phone conversation14. Working as drive free USB flash disk15. MP3 functionSpecifications:Battery capacity: lasting for about 3-5h while continuously recordingLasting for about 3-5h while continuously playingRecording format: WAVMusic format: MP3/WMA/WAVSampling frequency: 48KHZBits: 192KBPSSize: 47*19*7mmRemarks:Due to the recording effect of this product, relatively clear quality, and high parameters having reached the top parameters, the recording file is relatively big, thus, please extract and save the recording file timelyWaring tips: this machine comes with an intelligent reset system, please save the file being recorded before connecting the computer.Package includes:1x 8/16/32GB voice recorder1x user manual