... ,power on/off switch button7,LED indicator for on/off8,mircophone and speaker output.9,internal ... microphone for direct talk on internet.10, used as ... pad11, black compact panel and smooth surface suitable for all mechanical and optional mouses12, Flash LED light ... *21*2.2cmpower: 5V USB line or DC 5V adapter(no included) USB1.1 music mouse pad 2 stereo ...