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). Multi-device wireless keyboard: beautiful type-on-everything keyboard for any computer, tablet and smartphone via USB or Bluetooth smart wireless connection Slim, Quiet Keyboard: The Logitech PerfectStroke key system provides quiet and precision typing, solidly designed with thin, laptop-like, carefully crafted concave keys and shortcuts Reliable Connectivity: Connect your device via Bluetooth or Unifying receiver; this keyboard also features an integrated rubber cradle that carefully holds various devices at a comfortable angle Adaptive Layout: Compatible with Windows, Mac, Android and iPadOS, this compact keyboard recognizes the device it's connected to so all keys and shortcuts are exactly where you expect them to be Reliable Power: This portable multi-device keyboard comes with 2 pre-installed AAA batteries which can last up to 24 months (1) with a built-in auto-sleep function and an on/off button