The Expert Mouse Wireless Trackball gives you the freedom to be productive without being limited by a USB cable. The trackball can be paired through Bluetooth® 4.0 LE to save a valuable USB port, or connected via the included USB nano receiver. TrackballWorks™ software offers incredible customisation 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.