Pass Seymour® Hospital grade duplex decorator GFCI receptacle. NEMA 5-20R configuration number. Patented SafeLock™ protection for more safety shuts off power to the receptacle if there's a ground fault, if the GFCI is miswired and even if the GFCI fails. This prevents the unsafe condition of power without protection. Tamper-resistant automatic shutter system prevents young children from inserting common objects such as hairpins or keys. The most durable GFCI available exceeds UL943 voltage surge requirements, survives 100x the required UL 3 kA/6 kV voltage surge test cycles. Audible alarm notifies end user of tripped GFCI. Provides supplemental notification (along with trip Indicator light-red LED). Alarm can be turned on/off. Side or internal screw-pressure-plate back wire termination speeds installation takes 10 to 14 AWG stranded or solid, copper or copper clad conductors. Two back-wire holes per termination add wiring flexibility, eliminate pig tailing and save box space. Ground terminal back-wire clamp for fast installation. High-impact-resistant thermoplastic construction for superior strength and durability. 10 kA short circuit rating.