Sperry Instruments Stop Shock™ GFCI Outlet Testers w/"Hazardous Ground"
Advanced circuitry detects hazardous ground conditions not identified by standard outlet testersGFCI function tests standard outlets that are wired in series with GFCI outlets (multiple outlets in kitchen or bath)Soft grip ergonomic design does not "cut into hands"Three color LEDs indicate 7 common wiring conditions