Leviton 7899-HGG 20-Amp, 125-Volt, Hospital Grade, SmartLock Pro GFCI, Nylon Wallplate and Screws Included, Gray Patented Bridge Contact Provides Individual Sets of Contacts for GFCI Receptacle Face and Downstream Receptacles; No Power to Receptacle Face if Improperly Wired ( Line-Load Reversal Patented Lockout Feature for Added Safety Prevents RESET if GFCI is not Operating Properly Advanced Electronics Design Provides Superior Resistance to Electrical Surges and Over-Voltages Impact-Resistant Thermoplastic Construction Backed by a Limited Two-Year Warranty