imensions Mouse Height: 3.22 in (81.9 mm) Width: 1.94 in (49.4 mm) Depth: 1.25 in (31.8 mm) Weight (with batteries): 1.83 oz (51.9 g) Receiver Height: 0.74 in (18.7 mm) Width: 0.57 in (14.4 mm) Depth: 0.24 in (6.1 mm) Weight: 0.06 oz (1.8 g) Technical Specifications Sensor Technology: Advanced Optical Tracking Sensor resolution: 1000 Number of Buttons: 3 Scroll Wheel (Y/N): Yes Battery: (6- month battery life) 1It may vary based on use and computing conditions. Battery type: 1 AAA battery Wireless operating distance: Approx 32.81 ft (10 m) 2It may vary based on use and computing conditions. Wireless technology: Advanced 2.4 GHz wireless connectivity Interface: USB receiver