1. The tool can perform functional tests and fault detection on the trailer circuit, and can test the circuits of the taillights, brake lights, backup lights, left turn signals, right turn signals and auxiliary power supply
2. High-quality brass inner core, good contact performance, efficient and reliable transmission, not easy to short circuit, with LED indicator, easy to read the fault without guessing
3. Waterproof shell, impact-resistant, easy to grip, easy to plug and unplug