This is a brand new IPA electric brake force meter. Simulates trailer load and displays real time, output gain, and application time. Troubleshoot tow circuit, brake lights, turn signals, and reverse lights. It has a 25 ft cable, so you can test in the cab with no need for another person. Model #9107A. Comes with case, 25ft cable and testing unit. Standard towing connection, but please verify it works for your application. This product has been Tested!!!!