Specification: Name: Wireless mouse Color: Black Material: ABS Number of keys: 4 Type: 2.4G Wireless Transmission distance: Up to 10m DPI: 800-1200-1600DPI Batter Capacity: 500mAh(rechargeable lithium batter) Item size: 11.3 * 5.8 * 2.6cm /4.45 * 2.28 * 1.02in(L * W * H) Item weight: Approx. 79g /2.79oz