Microsoft Arc Touch Bluetooth Mouse The award-winning design of Arc Touch Bluetooth Mouse was created with a mobile lifestyle in mind. When in use, this stylish piece of ingenuity shapes to the natural curve of your hand. And when youre done, just flatten it out for easy storage in your pocket or bag. Connects wirelessly with Bluetooth for a clutter-free experience. BlueTrack Optical Sensor, Works with Bluetooth 4.0 Enabled Devices 2.4 GHz Wireless Frequency