Enjoy exceptional typing on your computer, smartphone, and tablet -- all from one fully equipped and beautifully finished keyboard. The K780 Multi-Device redefines what a desktop keyboard can do, letting you switch typing easily between all the devices you enter text on. * It connects to three devices at once so you can write an email on your computer, then reply to a message on your phone with the same keyboard, at the touch of an Easy-Switch button. Enjoy comfortable, fluid typing on quiet PerfectStroke keys. It works with Windows, Mac, Android and iOS and features an integrated rubber cradle to hold your mobile device at a perfect angle and within reach. Choose to connect with a Logitech Unifying USB receiver or Bluetooth Smart technology. Two year battery life from two pre-installed AAA batteries. *USB-equipped or Bluetooth Smart ready device that supports an external keyboard (HID profile).