Multi Device K375s Logitech

Logitech Unifying protocol: 2.4 GHz Bluetooth Smart technology Wireless range: 10 m (33-ft) wireless range 1Wireless range may vary due to environmental and computing conditions. Wireless encryption is between keyboard and the connected computer or mobile device. Wireless encryption: Yes 2Wireless range may vary due to environmental and computing conditions. Wireless encryption is between keyboard and the connected computer or mobile device. 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 3a) Tested under limited conditions (maximum of 60 ml liquid spillage). Do not immerse keyboard in liquid. b) Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary.