Innovative special mini design suitable for laptop users and students. Resolution 400dpi or 800dpi available Fix location exactly and move freely Zoom in and zoom out functions Simply installation plug and play Compatible with Win95/98/2000/ME/XP/NT Interface:PS/2 Color: black,silver Size: 91*51*31mm Packing Infomation: Weight: 200g Carton: 100pcs/ctn