The PC Cable Tester is a stand- along test device, it designed to provide you to test the popular used PC data cables (Optional advanced model can test two more cables such as the USB and 1394) for identified the wires connecting status- open, shorted, cross, miss-wire and continuity wires. It is a very good tool for most cable dealers, cable assembly house or system integrators to quickly check the pin configuration or trouble shooting in every work environment.