Specifications:100% Brand NewMaterial: Plastic and MetalVoltage: 12VFeatures:Automotive Relay TesterThrough continuous car battery (11V-15V) to the relay coil, the detector can correctly check the contact function of the relay. The tester observes contact data, closing time, relay inertia, etc. at each test step, test whether the relay is opened and closed, if the relay is abnormal, the red LED will light up, normal is that the green LED will light up.Package Content:1 Relay TesterNote:1. Due to the difference between different monitors or color reflection in the monitor's lighting, background etc., the picture may not reflect the actual color of the item.2. Please allow 1-5mm error due to manual measurement.3. The car battery should be 12V battery, 4. The battery voltage should be between 11V and 15V.5. The applicable coil resistance should be greater than 20 ohms.