The Klein Tools ET250 AC/DC Voltage/Continuity Tester is a reliable and high-quality product manufactured by Klein Tools in the United States. This tester is designed to accurately detect AC/DC voltage and continuity, making it a versatile tool for various electrical testing applications. The inclusion of a California Prop 65 Warning ensures users are aware of potential safety risks associated with the product. Powered by AAA batteries, this tester is a handy and essential tool for both professionals and DIY enthusiasts.