The Kensington 72229 PocketMouse Convertible Dual-Size Mouse is like having two mice in one, with the versatility of a mini mouse and the comfort of a full-size mouse. When you are on the road, this mouse is an ultra-compact mini mouse with both go-anywhere size and precision performance, but when in the office, a soft AirForm shell clips onto the mouse, bringing you the palm-cradling comfort of a full-size mouse. This mouse not only gives you comfortable wireless freedom, but Kensington's interference-free Quick RF wireless technology prevents annoying cursor hesitation to provide ultra-smooth movement and precise control. This mouse also comes with DiamondEye optical technology that allows it to respond to even your fastest movements with accurate tracking on virtually any surface. The Kensington 72229 has two programmable buttons that streamline tasks with single-click convenience, and a scroll wheel that allows you to speed through long documents or web pages with ease. The Kensington 72229 works right out of the box, with long-lasting reliability that is backed by a one-year manufacturer's warranty.