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 *Designed for big-hand users, comfortable to use. *Ergonomic design, 7 colors back light makes your mouse special than others *High-precision optical engine makes scrolling more efficient and convenient. * buttons design ( left + right + wheel button) is the best choice for desk top Product Specification/Models *Resolution: 400/620/800CPI available *Plug&Play *PS/2,USB and combo port available. Application *IBM PC Pentium 400 compatible or higher *Windows XP/Me/2000/98 Other Information Email: MSN: Tel: +86-755-29950835 Fax: +86-755-29950853 Website: