SpecificationsSensor: OpticalDPI: 800-1200-1600-2400Buttons: 6Switch rating: 3 million clicksBacklight: 7 colorsInterface: USB 2.0Cable length: 1.8 mOS support: Windows XP or newer  FeatureRight handed ergonomic mouse shape suits various grip stylesRubber scroll wheel for enhanced feel7-color backlight  with breathing effectNo driver required