USB 6D Wired Optical Mouse * Dimension (W*H*D): 109*58*33mm * Ergonomic design * Good idea for desktop & laptop * Extra Forward & Backward function * Newest optical technology with adjustable 800~1200~1600~2400dpi high resolution * Key switch life more than 5 million times * Support Win 98/2K/NT/ME/XP/Vista/7, Linux,and Mac 10.0 higher version