Precision. Performance. Maintenance-free. It's all here in ETO optical mouse! High performance Optical Engine and more efficient scrolling will help you do more, better,faster with greater control. Product Feature *Elegant and comfortable design, big size *Resolution: 400/620/800CPI available *Plug&Play *PS/2,USB and combo port available. Product Specification/Models *IBM PC Pentium 400 compatible or higher *Windows XP/Me/2000/98/95/NT, MS-DOS Application *Standard-export Carton size: 642*355*400MM/60PCS *Gift-box size:188*172*40MM *G.W.:9.1KGS *40HQ loading Q.T.Y:44640PCS *20FT loading Q.T.Y:18720PCS Other Information Email: MSN: Tel: +86-755-29950835 Fax: +86-755-29950853 Website: