SlimBlade Trackball - Making your computing experience smoother, faster and easier, this dual-laser trackball puts complete control of multiple computer functions at your fingertips. Features three modes, so you can scroll, adjust volume and zoom, with just the multifunction ball. Its low-profile shape makes it comfortable to use for hours on end. Sleek stationary design saves desk space. Connector/Port/Interface: USB; Left/Right Hand Use: Left/Right; Mouse Technology: Trackball. Ball is Ruby Red.