Kensington Pro Fit Ergo TB550 Wireless Trackball Wireless Patented Ball Eject Button BluetoothLow Energy 9 Function Buttons K72196JP

51% recycled plastic: Kensington uses 51% recycled plastic to ensure sustainable management. High-precision optical sensor: Equipped with a high-precision optical sensor. Achieves smooth and precise cursor movement. You can also adjust the cursor speed with the DPI button on the bottom. (400DPI, 800DPI, 1200DPI, 1600DPI) Dual wireless connectivity: TB550 trackball can be connected via Bluetooth@Low Energy(LE) or 2.4HGz wireless connection (2.4GHz wireless receiver). Ergonomic design: Ergonomically designed for comfortable operation even during all-day use. The 45° tilt allows you to maintain a natural hand and wrist angle while using the mouse, similar to shaking hands. The scroll wheel also has a 4D scroll function, so you can scroll vertically and horizontally. Patented Ball Eject Button: Kensington's patented ball eject button allows for easy ball ejection. Very convenient for regular maintenance.