The trackball can be paired through Bluetooth 4.0 LE to save a valuable USB port, or connected via USB nano receiver. TrackballWorks software offers incredible customization, and optical tracking technology offers smooth, precise cursor control. Plus, our award-winning Scroll Ring lets you quickly scan up and down web pages or long documents. Add it all up and you get exceptional comfort and ease-of-use from the brand that has set the industry standard in trackballs for more than 30 years. Wireless connection via Bluetooth LE or USB nano receiver Compatibility with Bluetooth 4.0 LE: Windows 10, 8.1 and Mac OS X 10.8 and later* TrackballWorks compatible with Mac only when using 2.4GHz connection Kensington worked directly with Microsoft to provide professional-level solutions that look as good as they function, so you can work like a pro. Optimized for your Windows 11 Trackball Functions TrackballWorks software lets you customize all 4 buttons, adjust cursor speed DiamondEye optical tracking.