No dongle, no trackball!!! The Kensington M01286-M Expert Mouse is a high-quality trackball mouse that offers a sleek and ergonomic design in black color. With optical tracking method and a maximum DPI of 1600, this mouse provides precise and smooth control for your computer or tablet. The wireless connectivity option allows for flexible use without the need for a dongle, while the 4 buttons ensure easy operation for everyday tasks. This expert mouse by Kensington is a reliable and efficient choice for those looking for a comfortable and efficient pointing device.