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1.This tester is designed to test the condition of your car relay.
2.Test to properly control the opening and closing of the relay.
3.If the relay is abnormal the red LED will light, it's normal the green LED will light.
4.Provides a convenient and intuitive diagnostic way, time-saving and economical.
5.Small size, compact structure, easy to carry, you can test anywhere as you want.
1pc X 12V Electronic Automotive Relay Tester Auto Car Diagnostic Battery Checker Tool