specification:Item Type: Automotive Relay Tester_x000D_Material: ABS, metal_x000D_Car Battery Voltage: 12V DC_x000D_Application:_x000D_The test battery voltage must be between 11V-15V_x000D_Suitable coil resistance should preferably be greater than 20 ohms Features: 1High Performance: The relay tester will automatically detect the pin position, the release time of the action, and the consistency of the relay in each test phase. 2Easy to Use: Check the relay before testing. Select the appropriate socket and insert the relay, press the "Test" button, and the tester will detect the pin position of the unknown relay. 3Diagnosis Indication: If the tester lights up the green LED light, the relay is normal, if the red LED light is on, the relay is abnormal. 4Fitment: When testing, it needs to be connected to the car's 11V?15V battery. The car battery must be a 12V battery, the coil resistance is preferably above 20 ohms. 5Compact: Small and easy to carry around for on the go jobs, allows easy use no matter where you are, give you the results you need quickly and easily. PackageList:1 x Tester 1 x Manual