Add a db9 serial port to the rear panel of a small form factorlow profile computerr r connects to your motherboard and adds an additional db9 serial port to the back of your pcr easy to use and installr backed by startechcoms lifetime warrantyr r the plate9mlp 9pin serial male to 10pin motherboard header lp slot plate adds a db9 serial port to the rear panel of small form factorlow profile computer connecting to the host computer motherboard using an idc10 connectorr please refer to this