Connection type: wireless Operating distance: 10 (m)/32.81 feet Interface: USB Wireless transmission frequency: 2.4 GHz Handling: optical Photoelectric resolution: 1600DPI Scroll wheel direction: Bidirectional Number of buttons: 3 Battery: 1 X AA battery Product size: 110 X 61 X 34 mm/4.33 X 2.40 X 1.34” Product weight: 60 g