Fits like a mouse, works like a trackball.
Sleek shape flexible enough to use in either hand.

Two ways to scroll: click two small buttons for page up and page down, or click one of two large buttons and use the ball for auto-scrolling.

Durable optical technology for smooth precision and resistance to dirt, eliminating the need for cleaning.

Large, finger-operated trackball for superior control and reduced hand and wrist movement.

• Features
• Compatibility
• Specifications
• Gallery

	Ambidextrous trackball design A trackball design with a long, broad palm area and gentle curves keeps your hand comfortable and supported all day-whether you use your right or left hand.
	Convenient button controls Buttons let you easily move forward and backward when you're surfing the Web.
	Stable base Your hand stays comfortable all day long with this stay-put design. Plus, it saves you space.
	Fingertip-based control You'll enjoy fast, accurate cursor movement with just a move of your finger.
	Marble® optical technology Our patented technology gives you smooth tracking on almost any surface so you can be productive wherever you work.

	USB
	Windows XP and later(including Windows 7)
	Mac OS 10.4 (Tiger) and later