SpecificationsSensor: OpticalDPI: 800-1600-24003200-4000-4800 (default)Buttons: 7 (programmable)Switch rating: 3 million clicksBacklight: RGBPolling rate: 125 HzInterface: USB 2.0Cable length: 1.5 mSize: 125 x 74 x 39 mmOS support: Windows 7 or newer FeatureFast Key to execute a double left click with only one key pressQuick 6-step DPI selection up to 4800RGB backlight with multiple selectable lighting schemesFull palm grip design