Logitech R500s Bluetooth Laser Pointer Presentation Remote

Laser
Class: 1 laser
Max output: less than .039 mW
Wavelength: 640-660 nm (red light)

Battery
Battery: 12 months + 1 extra week without laser pointer When your battery is low, the R500s 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 2.4GHz wireless connection
Wireless range: 20 m