Products descriptions: Mini optical mouse. Optical sensor with rsolution :1000 dpi Scroll wheel with page up and down Key life over 3, 000, 000 times Ergonomic & comfortable design with good hand touch Color printing all colors available optional. Compatible : windows7/95/98/se/nt/xp/2000 Size : 87*50*32mm Interface : USB port Zantek international limited is a private high-tech enterprise, which is specialized in computer peripheral product industry, located in shenzhen of china. It was founded with the mission of providing our customers with quality products, professional service, and informative product information. 100pcs/carton, gw:23kg.