The ideal productivity enhancer for any mobile professional, the Orbit® Wireless Mobile Trackball offers compact comfort and precision for the road. A reliable wireless connection provides greater versatility and the receiver stows inside the trackball. Unique touch scrolling, along with the compact 32 mm ball, lets you glide effortlessly up and down the screen. Compatible with Windows ®8, Windows ®7, Windows® XP, Windows Vista® and Mac OS® X.