The Gigabyte M5050 curvy optical wired mouse for both left and right handed users Black finish Key Features Size (type) Standard Mouse Colour Black LED Colour None Tracking Optical Buttons 2 wheel Wheel Yes DPI 800 Connection USB Programmable No On-board Memory None Ergonomics (hand) Both Dimensions (LxWxH) 118x59x40mm Weight 88g Customizable Weight No More Information Outstanding Contoured shape Experience comfort in either hand contoured shape Black Surface More competitive price and higher quality 800dpi Optical Engine Enjoy smoother tracking more accurate cursor control Tracking system Optical technology FPS(Frame rate per second) 3000fps Maximum acceleration 20g Maximum speed 28 inches sec Support OS Windows 982000MEXP 32bitVistaWin7 Certificate CE FCC BSMI Cable Length 15m