Review on Amprobe ST 102B Socket Tester GFCI by Jaleel Pruitt

A really useful tool if the switch panel is not labeled or is labeled incorrectly and you cannot find the control switch. It's relatively easy to use if you follow the instructions. Simply plug the transmission tool into an electrical outlet, then operate the power tool just once over the switches on the control panel to activate the tool. Then simply slowly slide the tool back over the switches until you hear the warning. This is the breaker that controls the socket you inserted the tool into. Just remember to use common sense precautions when working with electrical components.