Whether you work from home, in the office, or on the go, today's users are looking for devices that combine comfort and productivity while emphasizing durability. The Pro Fit™ Ergo TB550 EQ trackball allows users to easily switch from a mouse to a trackball to enjoy its ergonomic benefits and save space. With its sleek design, the TB550 EQ uses at least 51% post-consumer recycled content in all plastic components*. The dual Bluetooth® Low Energy or 2.4 GHz wireless connectivity offers maximum flexibility. The TB550 EQ also features a rechargeable battery, 4D scroll wheel, and a patented ball ejection system that simplifies cleaning. * Product features;* The ergonomic streamlined design offers long-lasting comfort. The Pro Fit™ Ergo TB550 trackball features a unique 45° tilt, improving wrist and forearm alignment. The 4D scroll wheel allows vertical and horizontal scrolling. * The Pro Fit™ Ergo TB550 trackball offers Bluetooth® Low Energy (LE) and 2.4 GHz wireless connection options (2.4 GHz nano receiver included). The battery of the Pro Fit™ Ergo TB550 trackball provides 4 months of autonomy on a single charge. * Certified recycled material compliant with the SCS Recycled Content Standard V8-0, with at least 51% post-consumer recycled materials in all plastic components. Except for the printed circuit board and battery1.* The unique easy-to-clean design of the Pro Fit™ Ergo TB550 trackball features a ball ejection button simplifying trackball cleaning. * A high-quality optical sensor ensures smooth cursor control and precise tracking of the 34 mm trackball.* The trackball offers 4 cursor speed settings (400, 800, 1200, and 1600 DPI). * Users are up and running in no time with easy Plug & Play installation. The TB550 can be customized using the free KensingtonWorks™ software to enhance productivity. * The Pro Fit™ Ergo TB550 trackball includes government-grade 128-bit AES encryption for enhanced security. * This product is designed to comfortably fit medium to large hands.