The Faith Electric GLS-20A-IV-10 self-testing ground fault circuit interrupter outlet provides continuous protection from ground faults disconnecting power in 1/40 of a second if a dangerous condition is detected Once connected to power this GFCI receptacle automatically self-tests every 2-1/2 hours The green indicator LED light turns off if the outlet is not receiving power is broken or if it is at end-of-life Slimmer modern design for easier and quicker installation in electrical boxes Test and reset buttons match the device face color to blend in seamlessly Meets or exceeds UL943 2015 standards Compliant with National Electric Code (NEC) requirements ETL listed 10 pack Each pack includes (1)20Amp ivory GFCI receptacle (1) 4 59"x 2 76" ivory wall plate (2) screws installation manual stickers US-based customer support