Kensington Pro Fit Ergo TB450 Bluetooth 2.4GHz with Dual Wireless Capability, Up to 18 months of Battery Life, Ergonomic 34mm Thumb Operated Trackball Mouse, Made from 50% Recycled plastic (K72194WW)

50% of overall plastic is recycled material - Kensington is committed to help reduce the impact of plastic on the global environment Sculpted ergonomic design provides all-day comfort, featuring a unique 45° tilt that helps improve wrist and forearm alignment, the TB450 offers 4 switchable cursor speeds (400, 800, 1200 and 1600DPI) Choice of Bluetooth Low Energy (LE) and 2.4GHz wireless connection options, 2.4GHz nano receiver included A patented ball ejection system features a unique, easy-to-clean design with built-in trackball ejection button to effortlessly remove the trackball for cleaning purposes when needed Government-grade 128-bit AES encryption for enhanced security to deter hackers from monitoring wireless connection and capturing sensitive information