Klein Tools Non-Contact Voltage and GFCI Receptacle Premium Test Kit (Cat. No. NCVT1XTKIT) includes a Non-Contact Voltage Tester and a GFCI Receptacle Tester. The Non-contact Voltage Tester (Cat. No. NCVT1XT) detects voltage 70 to 1000V AC, is dustproof and waterproof with an IP67 rating, and has durable 9.8-Foot (3 m) drop protection. The GFCI Receptacle Tester (Cat. No. RT210) is designed to detect the most common wiring problems in standard and GFCI receptacles. 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.