EASY INSTALLATION-Only spend as short as 10 minutes. COMPLETE COMPONENTS INCLUDED-1 free wall plates, standard wall plate included. Meets different install requirements.Instruction, screws and stickers included. TR FOR SAFETY PROTECTION-It may stop the kids use any foreign body to contact any alive parts of the receptacle from the outlets. Keeps away from electrical shock.The GFCI device meets 2014 NEC (National Electrical Code), UL standard 943 class A GFCI and 498 receptacle. SELF-TEST FUNCTION-GFCI automatically tests itself every five minutes, ensuring it works properly. We have approval SafeLock Protection feature on this GFCI:if any component is damaged and the protection is lost,power to the receptacle will be disconnected. It is a safety electrical device for kitchen, bathroom, school, commercial place,etc. CERTIFICATE AND WARRANTY-We offer 1 year warranty on this GFCI receptacle and UL listed.