Orbit optical trackball with DiamondEye technology for precise tracking and cursor control uses less arm movement and desk space than a conventional mouse.USB and PS/2 connectivity.

The exceptional comfortable ergonomic design provides unmatched palm support. Logitech\'s cordless technology helps to eliminate cable cutter. Eight buttons which includes forward, back and drag-lock buttons. One-touch access to common tasks and activities. Fingertip-based control enables fast, accurate cursor movements. Patented marble technology ensures smooth tracking. WxDxH: 230x210x90mm.