Class: 2 laser| Max output: less than 1 mW| Wave Length: 640-660 nm (red light)| Battery: 12 months + 1 extra week without laser pointer| Indicator Lights (LED): Battery and Connectivity LED| 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.