Logitech R500s Bluetooth Presenter

Logitech R500s Bluetooth Presentation Remote - MID GREY Technical Specifications 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 1 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 2 It may vary based on use and computing conditions.