Features • Designs in right-handed, ambidextrous or left-handed. • 4 gradations color lighting* User-defined key by software* Highly precise Optical sensor is guaranteed to deliver the best performance. • Works for Windows 2000/XP/Vista/Win 7/Win 8 • USB interface, 5V/100mA • 6 buttons • 800 /1200/2000/3200 Dpi selection • Product size : L 125 x W 73 x H 39 mm • Product weight: 135 g