1.Power switch/record switch. 2.''+'' volume plus/key for song. 3.''_''volume /mp3 music conversion key 4.Headphone 5.Work indicating lamp Recorded file in:wma/mp3 High capacity Built-in rechargeable lithium battery USB storage write protection one-touch recording & high quality recording Recording via high grade built-in microphone Recording te;ephone conversation Working as drive free usb flash disk MP3 function Battery capacity:lasting for about 3-5h while continuously recording Lasting for about 3-5h while continiously playing Recording :WAV Music :MP3/WMA/WAV Lasting for about 48h for 4GB while continuously recording Sampling frequency:48KHZ Bits:192KBPS Remarks:Due tothe recording effect of this products ,relatively clear quality and high parameters having reached the top parameters,the recording file is relatively big,thus, extract and save the recording file tips:for this machine comes with the intelligent reset system, save the file being recorded connecting the computer. Memory Storage:8GB Colour:Black Material:plastic Size:47x19x7mm Package Contents: 1 * Digital Audio Recorder(8GB) 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.