The outer layer of the connecting wire is crafted from PVC materials, which have good tensile performances, and its service life is long than that of ordinary wire, avoiding the trouble caused by frequent replacement. Featuring flexible length and corrosions resistant pin, this black connector ensures stable data transmission during engine control unit programming or systems troubleshooting. Optimizes workshop efficiency when diagnosing engine codes, abs errors, or transmission issue in trucks and industrial vehicles. Each connecting wire is crafted from copper, which reduces the diagnosis time and improves the efficiency of troubleshooting. Builtin shorts circuit protective systems ensures safe use under various working conditions and reduces accident risk.