From Kensington Technology Group:
Kensington USB Pocket Mouse Pro Wireless:Packed with the smartest features, the KensingtonÃ???Ã??Ã?Â® PocketMouseÃ??Ã?Â¢?Ã??Ã?Â¢ Pro Wireless allows you to work without cords and on any surface. The USB wireless receiver stows easily inside the mouse so there's just one thing to carry. Built-in power saving technology turns off the mouse when traveling, saving battery life and replacement hassle. Add a rotating USB connector, low-battery indicators, a 3ft range, and it's easy to see why PocketMouseÃ??Ã?Â¢?Ã??Ã?Â¢ Pro Wireless is the most intelligent mobile mouse on the market.