Auto Lock Inspection Loop Car Accessories for Locksmith or Key Programmer This tool is designed to check the lock loop and diagnose issues with car key lock systems. Features: 1. Check the lock ring: Use to verify the status of the lock ring. 2. Antenna tester: Designed for car lock detection circuit and car key lock chip antenna testing. 3. Indicator light function: If the light turns on but the car cannot start, it may indicate a chip issue. 4. Useful diagnostic tool: A practical device for automatic lock system inspection. 5. How to use: Connect to the automatic lock loop. If the light turns on, the lock ring is functioning properly. If the light does not turn on, there may be an issue with the lock ring. If the light turns on but the car fails to start, the problem may be with the chip. Specification: Product Name: Auto Lock Inspection Loop Color: Green Material: PP Length: 10cm Type: Test card Package Includes: 1 x Auto Lock Inspection Loop