Kensington K72337US Wired USB Orbit Trackball w- Scroll Ring (Black-Blue)

Specifications Mfr Part Number: K72337US Features: Scroll ring allows fast, easy scrolling of web pages and documents Uses far less desk space than a mouse Optical technology for precise tracking - no cleaning required Ambidextrous design for left or right handed users Click-free scrolling USB connectivity PC and Mac compatible All-day comfort from a world leader in trackball innovation Certified For: Mac OS, Windows 7 Connectivity: Wired Sensor: Optical Controls: Programmable, Scrollring Convenience: Plug & Play, Ambidextrous Design Compatibility: Windows 7, Windows XP, Windows Vista, and Mac OS X Color: Black/Blue Packaging Dimensions (WxDxH): 6.0 x 2.0 x 8.0 inch Gross Weight: 0.65 lbs