This 2-Piece Klein Tools GFCI Outlet Tester and Non-Contact Voltage Tester tool set is perfect for home inspections. Klein Tools Receptacle Testers are designed to detect the most common wiring problems in standard and GFCI receptacles. A convenient chart on the tester helps determine wiring condition in outlets, based on LED lights results. Non-Contact Voltage Tester detects standard voltage in cables, cords, circuit breakers, lighting fixtures, switches, outlets and wires. 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. SMART BUY: A complete, high-performance kit that offers convenience and value COMPLETE OUTLET TESTER TOOL KIT: Includes GFCI Tester (Cat. No. RT210) and Non-Contact Voltage Tester Pen (Cat. No. NCVT1P) DETECT COMMON WIRING PROBLEMS: Quickly identifies wiring issues in standard and GFCI receptacles GFCI OUTLET COMPATIBLE: Confirms the proper operation of ground fault protective devices in GFCI outlets VOLTAGE TESTER PEN: Non-contact detection of voltage in cables, circuit breakers, lighting fixtures, switches, and more BRIGHT LED INDICATORS: High-intensity green LED indicates operational status, while red LED and warning tone signal voltage detection EASY CONTROL: Digitally controlled ON/OFF power button for convenient operation