Tamper resistant GFCI (ground-fault circuit interrupter) duplex receptacle. 15 A. 125 V. Made of metal and plastic. 2 poles and 3 grounding wires. Grey. With indicator light. Protected against ground fault shock hazard from frayed wiring, damaged appliances, wherever electrical contact might provide a path to ground throught a human body. Trips at 5mA threshold. Trips in 0.025 seconds for 240 mA fault. Can be wired to provide feed-throught protection to other outlets on the same circuit (20A).