On Sales! H:oter USB Wired Precision Optical Light Scroll Wheel Gaming Mouse for Pc/Laptop Computer DPI button to select favorite cursor speed 800dpi/ 1200dpi/ 2000dp Specialized design for most PC games Supprot Windows 2000/ 2003/ XP/ Vista/ 7 ambidextrous shape feels good in either hand Scroll wheel provides easy navigation of documents and web pages