The ARMSTRONG™ 15 Amp 125 Volt Self-Test GFCI Duplex Outlet offers four levels of protection. The GFCI unit automatically shuts off power when it detects a ground fault. The tamper-proof shutters prevent small children from inserting foreign objects. The automatic self-test ensures the unit is working properly, and a green LED light tells that the outlet is functional and safe. Ideal for kitchens, bathrooms, and laundry rooms.