Logitech Professional Presenter Remote
-Laser Class: Class 2 Laser
-Max Output: Less than 1mW
-Wave Length: 522～542 nm (green light)
-Battery life (Laser pointer): 20-hour maximum
-Battery life (Presenter): 1050-hour maximum
-Wireless operating distance: Approx 30m
-Wireless technology: 2.4 GHz wireless technology
-Warranty: 3Year