The Upgraded DW833 Circuit Relay Tester is a versatile tool designed for testing 3-36V circuit relay systems with 4/5 pins. It features an LED work light for added visibility during testing. With a universal fitment, this tester is suitable for a variety of vehicles and is made in China. Whether you are a professional mechanic or a DIY enthusiast, this upgraded DW833 Circuit Relay Tester is a reliable aid in diagnosing and repairing electrical systems in your vehicle.