Dimensions Presentation remote Height: 4.55 in (115.5 mm) Width: 1.49 in (37.8mm) Depth: 1.08 in (27.4 mm) Weight: 2.01 oz (57 g) Receiver Height: 2.31 in (58.6 mm) Width: 0.65 in (16.5 mm) Depth: 0.31 in (7.9 mm) Weight: 0.21 oz (6 g) Technical Specifications Laser Class: 2 laser Max output: Less than 1m W Wave Length: 640～660nm (red light) Battery Battery type: 2 AAA batteries Battery life (Laser pointer): 20-hour maximum Battery life (Presenter): 1050-hour maximum Connectivity Wireless technology: 2.4 GHz wireless technology Operating distance: Approx 32.81 ft (10 m) 1It may vary based on use and computing conditions.