Feature:1. Through the continuous automobile battery (11V-15V) to the relay coil, the detector can properly check the relay contact function.2. The tester observes contact data, closure time, relay inertia at each test stage, etc.3. Test to properly control the opening and closing of the relay.4. If the relay is abnormal the red LED will light, it's normal the green LED will light.5. Fine workmanship and good performance. Specification:Material: Plastic, MetalColor: Black & RedVoltage: 12VSize: approx. 11x 6x2.8cm/4.3x2.36x1.1inchPackage included:1 x Relay Tester Warm Tips:Car battery must be 12V battery, the voltage must be between 11-15V. The coil resistance is preferably at least 20 ohms.
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