Logitech R500 Laser Presentation Remote – Mid Grey

“Laser:
Class: 2 laser
Max output: less than 1 mW
Wave Length: 640-660 nm (red light)

Battery:
Battery: 12 months + 1 extra week without laser pointer 4When your battery is low, the R500 goes into a ‘power-saving’ mode – disabling the laser to extend battery life so you can continue presenting for an extra week. Battery life may vary based on use and computing conditions.
Indicator Lights (LED): Battery and Connectivity LED

Connectivity:
Connection Type: Bluetooth low energy technology and 2.4 GHz wireless connection
Wireless range: 20 m 5It may vary based on use and computing conditions.”