Object consists of one printed circuit board and its cardboard box. Printed circuit board has two 15-pin, serial-port-type, "D-shaped" joystick port sockets on the metal nounting bracket. Box refers to 5 1/4 inch diskette that should be included with the printed circuit board, but that is not present. Box indicates compatibility with IBM PC, XT, AT, PS/2, and similar computers running at 4.77 to 35 MHz.