The 12V Car Relay Tester with Battery Clip is a universal tool designed for testing automotive relays in passenger vehicles. It is compatible with both 4 and 5 pin relays, making it versatile for various car models. The included battery clip allows for convenient power supply, and the compact design makes it easy to use on the go. This tester is a must-have accessory for car enthusiasts and mechanics looking to diagnose and repair electrical issues with their vehicle.