The Logitech T-BB18 TrackMan Wheel Marble Mouse is a sleek and efficient trackball mouse perfect for those who prefer a trackball over a traditional mouse. With a maximum DPI of 1000, this optical trackball offers precise and smooth tracking. The gray color and USB connectivity make it easy to integrate into any computer setup. Featuring a convenient scroll wheel and only 2 buttons, the Logitech T-BB18 is a reliable and comfortable choice for everyday use. PLEASE SEE PHOTOS FOR CONDITION