Take safety and efficiency to a new level with the Triplett Model ET550 AFCI/GFCI Receptacle Tester. Engineered to verify electrical outlet wiring and to assess the proper operation of GFCI and AFCI devices, it's a critical instrument for electricians, home inspectors, and DIY enthusiasts. Detect faulty wiring in 3-wire receptacles with ease, identifying six possible faults with the help of intuitive light indicators. With just a button push, test AFCIs, GFCIs, and 30mA equipment protection GFCIs for optimal safety. The ET550 includes a 19.7" (500mm) AC cord with a 3-wire plug, ideal for hard-to-reach receptacles, and three AAA batteries. A 1-year warranty comes standard for quality assurance.