The Dual-Range Non-Contact Tester checks for the presence of voltage in overhead conductors or finds faults in cables. The LOW range detects 50V AC to 1.5kV AC. The HIGH range detects 1.5kV AC to 132kV AC. The tester indicates the presence of voltage with both audible and visual signals. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.