MARVO SCORPION M312 Key Feature -High-profile design with enhanced palm support -Excellent control for all grip styles -Advanced customization software -Switch easily between multiple lighting schemes with just a button press Sensor Optical DPI 1200-2400-3200-4800 Buttons 7 (programmable) Switch rating 5 million clicks Backlight Rainbow Interface USB 2.0 Cable length 1.5 m Size 128 x 67 x 41 mm OS support Windows 7 or newer