Features: 1. Battery clip with rubber sleeve, safe to use, secure grip, not easy to fall off. 2. 3 different relay pin specifications, wide range of applications, 4-pin/5-pin switching, easy to use. 3. Humanized design, simple operation, just connect the cable and the TEST button to start the test. 4. LED display, clear instructions, green LED light indicates normal operation, red light indicates relay failure. 5. Compact size, lightweight and portable, easy to carry and convenient to use. Specifications: Condition: 100% Brand New Item Type: Relay Tester Material: Copper wire + plastic shell Color: As the picture shows Instructions: The tester correctly checks the opening and closing of the relay. The tester uses a 12V power supply for car batteries. Convenient car relay testing. If the relay test is abnormal, the bright red LED will light up; if it is normal, the green LED will light up. This product is a quick test tool for car relays, allowing you to determine their condition. By connecting a car battery (11V-15V) to the relay coil, the tester can accurately verify the relay's contact function. The tester will monitor contact data, closing time, and relay inertia at each test step. If all tests are successful, the green indicator light will illuminate; if the test fails, the red indicator light will illuminate. Package includes: 1 x Relay Tester. Note: 1. Only for use with a 12V car battery. 2. The voltage range during testing is 11V-15V.