Easy typing, even in the dark - Type effortlessly in all lighting conditions. A sensor detects the amount of light in the room and automatically dims or brightens the back-light to suit your needs Keyboard and mouse all in one -The K830 streamlines navigation in the living room by combining these two devices into one. The touch-pad is smooth and responsive with accurate cursor control and enhanced gesture functions. 10 meter (33 feet) wireless range - Lean back and browse from your couch or bed with Logitech Unifying or Bluetooth Smart technology. Compatible : Windows 7, Windows 8, Windows 10 or later Android 5.0 or later Chrome OS USB port or Bluetooth Smart enabled computer. Easy-access controls - The keyboard layout is optimized for a seamless, lean-back navigation. It has media hot keys like mute, volume up or down for quick entertainment control. Shortcut keys simplify navigation with Windows or Android.Cable Length (Power/Charging) 51.18 inch Worthy of the living room - designed to complement the modern living room with a combination of premium textures, metal-like finish and a unique key design crafted into a compact, solid form.Typing noise: within 55 dBA for all keys NOTE: Refer user manual before use