15 DAYS ON FULL CHARGE UP TO 10 MONTHS WITH BACKLIGHTING TURNED OFF BLUETOOTH LOW ENERGY WIRELESS CONNECTION LOGI BOLT USB RECEIVER (INCLUDED) MULTI OS COMPATIBILITY EASY SWITCH Keyboard Ambient light sensor Yes Proximity sensor Yes On/off switch Yes Bluetooth Low Energy (BLE) Yes Hot keys Yes Windows keys Yes Multi-device support Yes Keyboard key profile Low-profile Numeric keypad No Keyboard form factor Tenkeyless (80 - 87%) Pointing device No Keyboard language UK English Keyboard layout QWERTY Keyboard key switch technology Logitech Tactile Keyboard key switch Mechanical Device interface RF Wireless Connectivity technology Wireless Recommended usage Office Design LED indicators Yes Material Aluminium Surface coloration Monochromatic Product colour Graphite, Grey Adjustable keyboard height Yes Ergonomic design Yes Keyboard style Straight Adjustable backlight Yes Backlight colour White Backlight type LED Backlight Yes Features Cable length 1 m Wireless range 10 m Power Rechargeable Ye