... mini sound box,stereo digital sound box,USB HUB function,mini-microphone 2 USB Interfaces +speaker+External microphone+clamp.Patent No ZL200830153616.8 ... closed structure for ensuring the high sound quality.USB hub function with two USB ports,1.1 and 2.0 version are ... space of desk.black,red,white,blue colors are avaliable USB multifunction sound box Mini sound box