Leviton 7599-E 15-Amp 125-Volt SmartLock Pro GFCI Receptacle, Black Automatically test the GFCI every time the RESET button is pushed in. The GFCI will not reset if the GFCI circuit is not functioning properly By blocking reset of the GFCI if protection has been compromised, SmartLockPRO reduces the possibility of end-users incorrectly assuming that a reset GFCI outlet is providing ground fault protection when it actually is not The trip latch mechanism in SmartLockPro GFCIs is a one piece "T" design for efficient operation Trip threshold meets or exceeds UL requirements for tripping time Compatible with all Decora devices and wallplates, available in select Decora colors