This is a rare vintage Compaq M-S28 PS/2 white mechanical ball mouse with two buttons. It is a standard mouse with PS/2 connectivity and was manufactured in Malaysia. The tracking method is mechanical and the mouse is in excellent working condition. The color of the mouse is white and it comes with a unit quantity of one. The model of the mouse is Compaq M-S28 and it has been tested to ensure that it is fully functional. This mouse is a great addition to any vintage computer setup and is a must-have for collectors.