Complements your Microsoft Surface (sold separately) Bluetooth 4.0 offers wireless connectivity with a range of 15m (50ft.) in open air and 7m (23ft.) in an office environment, so you have the freedom to roam without being chained to wires Thoughtfully designed travel, height, pitch, and space contribute to faster, more accurate typing Optimized feedback and return force prevents accidental button presses Key sound, stiffness, and texture enable a consistent, quiet typing experience with excellent grip Runs on 2 x AAA batteries that provide up to a full year of use Compatible with Windows 10, 8.1, and 8; Windows 10 phone, Mac OS 10.10.5, 10.11.1, and 10.11.4; and Android 4.4.2 to 5.0