USB1.1/2.0 interface. Adopt all new optics a fixed position a technique, have the basic function of mouse, and take to roll a round three keys. The mouse is a 800 DPI resolution Has USB decoding sound function, does not need the sound card support. The achievement of adopting the D figures puts, the stereo set frequency is a 85 Hzs~20 KHz.. Is compatible Windows98/ME/2000/NT/XP/MAC OS and so on. Unit size:12*5.85*3.9 CM