This Logitech trackball mouse is a reliable peripheral for any computer. It is a wired, serial (RS-232) mouse with a mechanical rollerball tracking method. The mouse has two buttons and is in great working condition. The mouse boasts a sleek white design which matches almost any computer setup. It is a perfect fit for anyone looking for a reliable and efficient mouse. The Logitech M/N: M-MD14-9F-SW model is an excellent addition to any workspace.