As natural as a handshake.

* Elegantly contoured shape: Fits your hand for maximum comfort. Designed to support the naturally curved shape of your hand.
* Full-size design: Big. Broad. For support from your palm to your fingertips.
One spin and you'll never go back.
* MicroGear Precision scroll wheel with hyper-fast scrolling: Lets you fly through long documents and Web pages with one spin. Or, shift to click-to-click mode to scroll through lists and photos.
All the benefits of a cord with the convenience of cordless.
* Logitech's advanced 2.4 GHz wireless: Dramatically reduces interference with 300 times faster data rate.* Virtually no delays or dropouts.
You're in control.
* Adjustable-dpi laser engine: Provides two smooth-tracking modes (up to 1600 dpi) for customizable precision. Choose the dpi setting that's right for you-from pixel-precise to ultra-fast for customizable precision.
* Stealth thumb button: Makes it easy to jump from one program to the next. One of ten programmable buttons that put total control at your fingertips.
* Extended battery life: Minimize the hassle of changing batteries with nine months of battery life.** On/Off button saves even more power. Battery-indicator light eliminates surprises.

Specifications: