The USI Electric 15 Amp Self-Test GFCI Tamper-Resistant Receptacle Duplex Outlet includes an Automatic Self-Testing feature that continuously ensures an outlet's safety. The inclusion of a tamper-resistant construction will restrict access from single-prong objects such as keys, nails and other items. This USI Outlet includes an End of Life Indicator that will provide a notification when the GFCI (ground fault circuit interrupter) no longer delivers power. Large Test and Reset Buttons that match GCFI color make USI Tamper-Resistant Outlets an ideal addition for residential and commercial installations. USI Electric Self-Test Tamper-Resistant Duplex Outlets meet a series of standards, requirements and certifications.