This is a white Perixx non-branded PS/2 Optical Mouse to match your Commander X16 keyboard! Learn More... X Perixx White Optical PS/2 Mouse PS/2 Serial Port Mouse - Three buttons with scroll wheel Ergonomic Design 1000 DPI PERIMICE-209P is compatible with the Commander X16 and any PC with a Standard PS/2 Port Product Dimension: 4.3 x 2.3 x 1.5 inches Cable: 1.5 meter / 6 foot