The Vintage Microsoft InPort Mouse Dove is a 2-button serial mouse designed for IBM interface computers. Made in Japan, this yellow mouse features a mechanical tracking method for precise cursor movement. With a wired connection using RS-232 serial ports, it offers a reliable and retro computing experience for users looking for a classic Microsoft mouse model. Perfect for vintage computer enthusiasts or those seeking a reliable serial mouse for IBM systems.The unit has not been tested, but believe that it is in good working order.