Logitech R400 Wireless Presentation Remote (3Y)

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)

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.