The SNAP ON TOOLS USA EECT300HG Circuit Tester is a high-quality diagnostic tool designed for electrical systems operating on 6-12 volts. Made by the trusted brand Snap-On, this circuit tester comes with clamps and probes for easy testing. Although it does not come with a warranty, it is a reliable and durable option for automotive professionals and enthusiasts alike. With a California Prop 65 Warning, users are advised of any potential hazards associated with the product.