Rewrite the rules of desktop typing. Meet the K780 Multi-Device: the beautiful type-on-everything keyboard.* Enjoy quiet, comfortable typing, on your Windows PC or Mac, and switch typing to your phone or tablet at the touch of a button. An integrated rubber stand holds your mobile devices within reach and always at the perfect typing angle. Type. Switch. Go. USB-equipped or Bluetooth Smart ready device that supports an external keyboard (HID profile). Battery life calculation based on an estimated two million keystrokes per year in an office environment. User experience may vary.