LOGITECH - R400 Wireless Presenter Remote

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 10 m 1It may vary based on use and computing conditions.
Warranty Information:- 3-year limited hardware warranty