SmartLockPro tamper-resistant GFCI (ground fault circuit interrupter) duplex receptacle meets the 2008 NEC requirement. Shutter mechanism inside the receptacle blocks access to the contacts unless a 2-prong plug is inserted, helping ensure items such as hairpins and keys will be locked out. Back and side wired. Can be wired to protect all receptacles downstream on the same circuit. Heavy-duty construction offers long, trouble-free service life. Includes LED (light emitting diode) indicator light. UL (Underwriter's Laboratories) listed and CSA (Canadian Standards Association) certified for tamper-resistant devices. Wall plate not included. Limited 2 year warranty.