Automatic testing GFCI receptacle with nightlight. If no GFCI protection is present, the receptacle will render itself inoperable. Tamper-resistant, contains a UL listed safety shutter system that prevents the insertion of foreign objects into receptacles. The safety shutters will open only upon insertion of a two-prong or three-prong plug. Specification-grade. Two-pole, three-wire grounding. UL Listed.