Black plastic housing, 4.25" L x 2.6" W x 0.9" H; female DB-9 connector for use with a "real" serial port with RS-232 specs; removable plug-in connector with screw terminals for connection to the loop supply and telegraph equipment. No cable.
Please make sure your computer has a real serial port before ordering this version. Many computers, particularly laptops, have only USB ports. If you don't have any DB-type connectors on your PC, you can be sure that you will need the USB version!