The BrainStem serial interface board has a four pin connector at one end which plugs directly into the BrainStem GP 1.0 Board, or BrainStem Moto 1.0 Board. On the other end is a female DB9 connector, which can plug into your Windows serial cable (not supplied).

If your BrainStem module is mounted in a tight spot where this connector will not fit, a Serial interface Connector Extender Cable is available as an add-on part (this cable is sold separately).