used as mouse pad, play music, 4 port usb 1.1 hub, 2 stereo speaker 1,USB1.1 compatible, support ... 127Hi-speed devices.5,comes with 2 stereo speaker with 3.5mm plug.6,power on/off ... button7,LED indicator for on/off8,mircophone and speaker output.9,internal microphone for direct talk on ... internet.10, used as mouse pad11, black compact panel and smooth surface suitable for all mechanical and optional ...