The Expert Mouse Wired Trackball is the ultimate productivity enhancer that makes working at the desk quicker, more accurate and extremely comfortable for your hand and wrist. Featuring DiamondEye technology, the trackball uses optical tracking to precisely follow small flecks embedded in the large 55mm ball to provide smooth, accurate cursor control. The four buttons are customizable using our highly intuitive TrackballWorks software, while our award-winning Scroll Ring lets you quickly scan up and down web pages and large documents. Add it all up and you get exceptional comfort and ease-of-use that has set the industry standard for more than 20 years.

DiamondEye Optical Tracking Scroll Ring and Large Ball Ambidextrous Design Detachable Wrist Rest TrackballWorks Customisation DiamondEye optical tracking technology for premium cursor control and accuracy Award-winning Scroll Ring lets you scan up and down pages with ease Large 55mm ball is designed as a perfect sphere to provide exceptional precision Detachable wrist rest supports hand and wrist for ergonomic comfort Wired 180cm USB cable provides reliability and avoids need for batteries Detachable wrist rest cradles hand in comfort TrackballWorks lets you customize all 4 buttons, set cursor speed PC and Mac compatible Colour: Black Compatibility: Windows 8.1 Connectivity: Wired Controls: Scrollring Features: Ambidextrous Design Sensor: Optical Depth: 180mm Width: 150mm Height: 180mm Weight: 0.617kg