Features:1. Ergonomically designed optical tracking technology that works on many different surfaces and is ideal for home, office or gaming.3. When using the mouse, the body design will make your wrist comfortable.4. It's very suitable for game enthusiasts, programmers, office workers, surfing teenagers.5. This vertical optical mouse with ergonomic design, through comfortable little finger and thumb support and contoured palm support, seamless, healthy and efficient to ease the tension of the wrist.6. System support for Windows 2000, Windows XP, Windows 7, Windows Vista, Windows 98, Mac OS, Windows ME, Windows 8.Specification:Type: left hand wired vertical mouseNumber of buttons: 6Optical resolution: 1600dpiInterface: USBAdjustable resolution: third gear (800-1200-1600)Whether to support ergonomics: supportSize: about 125x75x62mm or 4.92x2.95x2.44inPackage List:1xMouse