Kensington Expert Mouse Trackball with Diamondeye Optical Tracking This premium trackball mouse employs Diamond Eye® optical technology for smooth, precise cursor movement. Its large ball gives you maximum precision and control while tracking. The comfortable, ergonomic design includes a detachable wrist rest that cradles hand in comfort. Award-winning Scroll Ring® allows precise fingertip scrolling. Designed to maximize your productivity. Mouse Technology: Trackball; Connector/Port: USB; Left/Right Hand Use: Left; Buttons: NA.

Product Specifications  Manufacturer #: KMW-64325 Product Details Expert Mouse Trackball with Diamondeye Optical Tracking, Silver/Black Cable Length [Nom]: 6 ft Color(s): Black/Silver Connector/Port: USB Depth [Nom]: 5 3/4 in Height [Nom]: 2 1/2 in Left/Right Hand Use: Left, Right Mouse Technology: Trackball Operating System Compatibility: Mac® OS X and later, Windows® 98, NT, 2000, Me, XP, Vista™ Width [Nom]: 5 in Wired/Wireless: Wired UPC: 50085896643253 Keywords: Computer Mice, Expert Mouse, KENSINGTON, Mouse, Optical Trackball, Trackball