Wireless Optical Blue Mouse with Ergonomic 5 Buttons, 800/1600 dpi, Scroll wheel, RF 2.4Ghz and Auto Sleep Function for laptop & PC Model : Gigablock WM342 Name: New Ergonomic full-size six buttons wireless optical mouse Color: Blue Adjustable dpi : 800/1600 Requirement : Windows XP, Vista or Windows 7, Mac OS 10.3 or Above