Feature:1. The battery clip with rubber sleeve, safe to use, strong clamping , not easy to fall.2. 3 different specifications of relay pins, widely used, 4-pin/5-pin switching, easy to use.3. Humanized designed, simple operation, just connect the wire and TEST button to start the test.4. LED display, clear instructions, LED green light indicates normal, red light indicates relay failure.5. Comapct size, lightweight and portable, easy to carry and convenient to use.Specification:Condition: 100% Brand NewItem Type: Relay TesterMaterial: Copper Core Wire + Plastic ShellColor: As picture shownInstructions:The tester appropriately controls the opening and closing of the relay.The tester uses a 12V power supply for car batteries.Convenient car relay test.If the relay test is abnormal, the light red LED is bright, if it is normal, the green LED is lit;This product is a quick test tool to test automotive relays and let you know the status of automotive relays. Through continuous car battery (11V-15V) to the relay coil, the detector can properly check the relay contact function. The detector will observe the contact data, the closing time, the inertia of the relay in each test stage and so on. If all the tests pass, the green light will be on; if the test fails, the red light will be on..Package List:1 x Relay TesterNote:1. Only used for 12V battery of car.2. The voltage range during testing is 11V-15V.