LCD readout shows the time required to trip a GFCI device|For use on three-wire, North American 120 V electrical outlets only|Detects voltage with simultaneous visual and audible voltage indicators|Bright flashlight illuminates work area and may be used independent of voltage detection function|Lightweight, compact tool with pocket clip provides convenient storage and quick access|GFCI Receptacle Tester features a large backlit LCD readout of voltage, and clear indication of wiring conditions|Patent pending detection of Open Neutral / Open Ground wiring fault|Non contact voltage tester's dual-range detects from 12 to 1000V AC or 70 to 1000V AC for a broad variety of low-voltage or standard voltage applications