Key features Compact size 6 button mouse with 1000 dpi high precision Blue Spot technology Accurate & high precision Blue Spot sensor that works on virtually all surfaces like wood, granit, carpet, black, white etc. Special button to switch sensitivity for normal (500 dpi) & high speed (1000 dpi) movement Ergonomic design with rubber coated edges for a firm grip Side buttons for easy web exploring (page back/forward) Compact design takes up limited space in notebook bags Just plug-in & start: no driver needed Package contents Mouse with 70 cm cable User's guide System requirements USB (Universal Serial Bus) port Windows 7, Vista or XP Intel-based Mac with Mac OS X 10.5 (Leopard) or higher