Specification: 100% Brand NewMaterial: Plastic and Metal Voltage: 12V Features: Automotive Relay Test Tool. Through the continuous automotive battery (11V-15V) to the relay coil, the detector can check the relay contact function correctly. The tester observes contact data, closing time, relay inertia at each test step, etc. Test to properly control the opening and closing of the relay. If the relay is abnormal the red LED will light, it is normal the green LED will light. Package Content: 1 Relay Tester Note: 1. Due to the difference between different monitors or the color reflection in the monitor 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 a 12V battery, 4. The battery voltage should be between 11V and 15V.5. The applicable coil resistance must be greater than 20 ohms.