GFCI Receptacle Tester With LCD - RT250 | Klein Tools - For Professionals Since 1857

EASY TO USE: Just plug into standard outlet, within about 3 seconds, if the wiring is correct, it will tell u the voltage and frequency of the AC in plain English. GFCI TRIP TEST : U can press the leakage test button to trip (test) a ground fault detector if there is one in the circuit. It does not require batteries and powers up using the outlet it's testing This is ideal for the average homeowner who may have no knowledge of wiring. It tells you exactly what the problem is, in words, making it easy to fix the problem.