Excellent feel ergonomic design Bluetooth high-speed transmission Intelligence energy saving design Operating Range: up to 10 meters Using 2 battery size AAA System requirements: -iPad, iPhone – all versions; -Bluetooth-enabled PCs or Laptop with Windows XP-10; -Bluetooth-enabled iMAc/Macbooks with Mac OS X 10.2.8 or above (note that some exceptions may apply. This keyboard may not be compatible with the Mac mini); -Smart phones or tablets with Android 3.0 and above (with Bluetooth HID profile); -Windows Mobile 5.0 and above Color: black