Logitech Professional Presenter R800 Pro

Laser Laser Class: Class 2 laser Max output: Less than 1m W Wave Length: 500~515 nm (green 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 98.43 ft (30 m) ?