This is a quick test tool for testing automotive relays, let you know the status of automotive relays.Product description 1. Test to properly control the opening and closing of the relay. Check the contact function of the relay correctly. 2. The streamlined design of the light and strong structure makes it easy to use the product.Note: The car battery must be a 12V battery, and the voltage must be between 11-15V. The coil resistance is preferably at least 20 ohms.Product attribute Name: Relay Test Material: plastic and metal Color: black and red Voltage: 12VWarm reminder 1. Please remember that due to the lighting effects, the monitor's brightness / contrast settings / etc's, there will be some slight differences in the color of the pictures and the actual items. Measured by hand, deviations of 1-2 cm are possible. 2. Please leave us a message if you have any questions. We will respond and offer you our best service.