If you are electronically inclined, have your own voltmeter, and would like to make your own Invisicord from an existing phone cord, or to convert an existing barrel style power cord (like for Whistlers and Cobras), this kit supplies you with the proper connector ends and heat shrink tubes, along with vehicle installation directions. This will contain the connectors needed for the smaller harnesses found on Infiniti, Nissan and a handful of other make/models.