The Pro Fit® Ergo TB450 Trackball combines the feel of a wireless mouse with the precision of a trackball. It uses an ergonomic design with a 45° tilt that helps improve wrist and forearm alignment, takes up less desk space than a conventional mouse, and is more comfortable during extended use. Users can choose Bluetooth® Low Energy (LE) and 2.4 GHz wireless connection options for maximum flexibility. Features long battery life, patented ball ejection system for easy cleaning and precision optical-tracking technology. The sculpted ergonomic design provides all-day comfort and features a unique 45° tilt that helps improve wrist and forearm alignment. The TB450 includes a choice of Bluetooth® Low Energy (LE) and 2.4 GHz wireless connection (2.4 GHz nano receiver included). Long battery life means up to 18 months of use with 2.4 GHz and up to 15 months of use with Bluetooth®. A high-quality optical sensor accurately tracks the 34 mm thumb-operated trackball, giving users smooth cursor control and optimal precision. The TB450 offers easy cursor speed transitions with 4 DPI options: 400, 800, 1200, 1600. Users will be up and running quickly thanks to Plug & Play Installation for simple setup. The TB450 can be personalized with free KensingtonWorks™ software to enhance productivity. Windows® ARM-based computers are currently not supported. Please check website for future compatibility updates. The TB450 includes government-grade 128-bit AES encryption for enhanced security to deter hackers from monitoring wireless connection and capturing sensitive information. This product is designed to comfortably fit users with average to larger sized hands.