SpecificationsSensor: OpticalDPI: 1200-1600-2400-3200Buttons: 6Switch rating: 3 million clicksBacklight: 4 colorsInterface: USB 2.0Cable length: 1.8 mSize: 136 x 72 x 42 mmOS support: Windows 7 or newer  FeatureHigh-profile design with enhanced palm supportExcellent grip and comfortUnique metallic looksBraided USB cable