Features: Relays Tester can quickly detect whether your Relays is working properly. It is easy to use and suitable for automobile relays on the markets. It supports 12V and 24V Relays testing. During testing, the equipment needs to be connectings to a 12V-24V car battery. When testing, turn the switches to 4PIN , 5PIN according to the Relays's pin position. Press the tester button and the tester will light up the green LED and flash, indicating that the Relays is working. If the tester button is pressings and the redness LED, it indicates that the Relays is not working. Ensure your vehicle's electrical system reliability with this car Relays tester. Identify and troubleshoot potential problem in your vehicle's circuitry, ensuring efficient performances. Suitable for both vehicle enthusiasts and repair enthusiasts, this Car Tester is essential tool for vehicle maintenance and repairs. Whether you're working in your own garage , at auto repair shop, this tester is perfect for regular maintenance and effective troubleshooting. Specifications: Material:ABS Package Includes: 1x Car Relays Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.