Connection Type: Logitech Unifying protocol (2.4GHz) Bluetooth Smart technology
Wireless Range: 33 ft / 10 m wireless range* * Wireless range may vary due to environmental and computing conditions.
Wireless encryption: Yes* * Wireless encryption is between keyboard and the connected computer or mobile device.
Software Support: Logitech Options for Mac (OS X 10.8 and above) Logitech Options for Windows (Windows 7, Windows 8, Windows 10 and above)
Indicator Lights (LED): 3 Bluetooth channel LEDs
Battery Indicator Light: Yes Battery: 2 x AAA Battery Life (not rechargeable): 24 months* * Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary.