Safe GFCI Outlet -Self-Testing Function Automatic, reoccurring test of the GFCI's performance -Safe Leakage Protection The black Ground Fault Circuit Interrupter Outlet Compliant with National Electric Code (NEC) requirements. ETL Listed. Designed to protect people from shocks from an electrical system, prevent serious injury and risks of electrical fire caused by ground fault; -Weather Resistant Constructed with advanced UV stabilized engineering to provide superior corrosion, temperature, and UV resistance, preventing discoloration and aging, ideal for outdoor & indoor use. -Tamper Resistant GFCI Tamper Resistant security mechanism with the outlet can keep children safe. The internal shutter system prevents objects from being inserted into the receptacle unless both prongs of a plug are.