Description: 1. Check the circlip: it can be used to check the circlip.2. Antenna tester: car lock detection circuit. Car lock chip antenna tester.3. Little tip: If the light is on but the car cannot start, it means there is a chip problem.4. Useful Detection Tool: It is a necessary tool for detecting auto lock5. How to use: check the loop automatic lock. If the light is on, it means there is no problem with the lock; If the light is off, it means there is a problem with the lock ring; If the light is on but the car cannot start, there is a chip problem. Specification: Product name: automatic lock inspection loop Color: green Material: PPD Length: 10cm Type: test card Package includes: 1 automatic lock inspection loop