12V Electronic Car Relay Tester Auto Vehicle Battery Fast Check Detector Meter Automobile LED Indicator Test Checker Tool Feature: 1. Made of high-quality materials, it is sturdy and durable, allowing you to know the status of automotive relays at any time. 2. Properly control the opening and closing of relays tested by the tester. 3. The tester adopts 12V power supply of automobile battery. 4. Convenient test of automobile relay. 5. If the relay test is an abnormal bright light red LED, if it is a normal bright green LED. Specification: Material: ABS+ electronic components. Size: 130 * 68mm/5.1X2.7in Color: Black/Red Introduction: This relay tester is a quick test tool, which can test automobile relays and let you know the status of automobile relays. By connecting the car battery (11V-15V) to the relay coil, the tester can properly check the relay contact function. The tester will observe contact data, closing time, connecting inertia of relay in each test stage, and so on. If all the tests pass, it will turn on a green light, and if it fails, it will turn on a red light. Tip: The car battery must be 12V, and the voltage must be between 11 and 15v. Coil resistance is preferably above 20 ohms. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement.