Control your cursor with a simple touch of the finger! The highly accurate Orbit® Optical Trackball is as easy to use as a regular mouse, but it stays in one place saving you valuable desk space. The precise Orbit® Optical Trackball tracking mechanism is also resistant to dust, reducing the need for regular trackball cleaning

Features

• DiamondEye™ optical technology for precise tracking and cursor control
• The comfort of a mouse and the fingertip control of a trackball
• Uses less arm movement and desk space than a conventional mouse
• USB and PS/2 connectivity for greater compatibility
• Kensington's unmatched satisfaction guarantee - five-year warranty, toll-free technical support, and 90-day no-risk trial

Specifications

• Orbit® Optical Trackball has a medium sized ball and two mouse buttons
• Cord Length: 6ft
• Metallic silver and black
• PS/2 and USB connectivity (for PCs and USB Macs) 

System Requirements
PC-Windows® 98, Me, 2000, or XP with USB port
PC-Windows® 95, 98, Me, NT, 2000, or XP with PS/2 compatible mouse port
Macintosh® with OS 10.1.5 or later
USB Macintosh® with OS 8 & 9, device will only function as a 1-button mouse