Ground fault receptacle tester and circuit analyzer. Tests ground fault receptacles by overloading circuit and tripping GFI. Tests for 7 conditions: Ground fault interruption, open ground, open neutral, open hot, hot/ground reverse, and correct wiring. Easy to use - simply plug tester into any 110/125V AC ground fault receptacle and press black button to overload circuit. Yellow. UL listed. 1 year limited warranty. 1 per card.