Professional Presenter Logitech R800

Height x Width x Depth:
1.5 in (38 mm) x 5.28 in (134 mm) x 1.1 in (28 mm)
Weight: 2.5 oz (71 g)
Color: Black
Laser Class: Class 2 Laser
Max Output: Less than 1mW
Wave Length: 522～542 nm (green light)
Battery type: 2 AAA batteries
Battery life (Laser pointer): 20-hour maximum
Battery life (Presenter): 1050-hour maximum
Wireless operating distance: Approx 30m 1
Wireless technology: 2.4 GHz wireless technology
Supported OS: Windows Vista, Windows 7, Windows 8
Interface: USB