The Pro Fit® Ergo TB550 Trackball combines the feel of a wireless mouse with the convenience and accuracy of an advanced trackball. A sculpted ergonomic design with 45° tilt helps improve wrist and forearm alignment. The TB550 takes up less desk space than a conventional mouse and is more comfortable during extended use. Users can choose Bluetooth® Low Energy (LE) and 2.4GHz wireless connection options for maximum flexibility. The TB550 offers seven programmable buttons and adds an enhanced 4D scroll wheel that provides intuitive four-direction scrolling. It also features long-life rechargeable battery, made of 51% recycled plastic, and patented ball ejection system for easy cleaning.Ergonomic DesignA sculpted design provides all-day comfort. The Pro Fit® Ergo TB550 features a unique 45° tilt that helps improve wrist and forearm alignment, and an enhanced 4D scroll wheel for an intuitive user experience.Dual Wireless (Bluetooth® Low Energy (LE) + 2.4GHz) Connection CapabilityThe Pro Fit® Ergo TB550 includes a choice of Bluetooth® Low Energy (LE) and 2.4GHz wireless connection (2.4GHz nano receiver included).Rechargeable BatteryThe Pro Fit® Ergo TB550 provides up to 4 months of battery life with a single charge via USB-C® port.Made With 70% Post-Consumer Recycled ABS51% of overall plastic is recycled plastic.Patented Cleaning SystemThe Pro Fit® Ergo TB550’s unique, easy-to-clean design features a built-in trackball ejection button to effortlessly remove the trackball for cleaning when needed.High-Quality Optical TrackingAn optical sensor accurately tracks the 34mm thumb-operated trackball, giving users smooth cursor control and optimal precision. The trackball features 4 switchable cursor speeds (400, 800, 1200, and 1600 DPI).Plug & Play InstallationUsers will be up and running quickly thanks to Plug & Play Installation for simple setup. The trackball features 7 programmable buttons that can be personalized with free KensingtonWorks™ software to enhance productivity.128-bit AES EncryptionThe Pro Fit® Ergo TB550 includes government-grade 128-bit AES encryption for enhanced security to deter hackers from monitoring wireless connection and capturing sensitive information.