The Kensington Pro Fit Ergo TB550 Trackball offers all-day comfort and features a unique 45° tilt that improves the alignment of the wrist and forearm. It provides the option of Bluetooth Low Energy or a wireless 2.4 GHz connection, as well as a built-in rechargeable battery with up to 4 months of battery life. The 128-bit AES encryption of government quality ensures enhanced security to prevent hackers from monitoring the wireless connection and capturing sensitive information. The patented eject system of the Pro Fit Ergo TB550 features a unique, easy-to-clean design with an integrated eject button for the trackball. A high-quality optical sensor accurately tracks the 34mm trackball, allowing for smooth cursor control and optimal precision. Thanks to plug-and-play installation, the Pro Fit Ergo TB550 is easy to set up, and with the free KensingtonWorks software, it can be customized to boost productivity. Kensington is also committed to reducing the impact of plastic on the global environment, which is why 51% of the plastic used in the Pro Fit Ergo TB550 is recycled plastic.