K780 Multi-Device Wireless Keyboard, BlackCompatible with a wide range of devices and operating systems, simplifying your office's tech situation. Its pre installed batteries last up to 24 months for extended typing, allowing you to avoid wired use that limits your mobility. Full size, easy to read concave keys make typing quick and comfortable, and a built in tray sits in front of the keyboard to support phones and tablets in a comfortable upright position for convenient use.