The Kensington Pro Fit Ergo TB450 Wireless Trackball is a sleek black trackball with a maximum DPI of 1600. This wireless trackball features programmable buttons and a comfortable ergonomic design. With Bluetooth connectivity, the Kensington trackball offers a convenient and precise way to navigate on your computer or tablet. The optical tracking method ensures smooth and accurate cursor movement, while the seven buttons provide all the functionality you need for efficient productivity.