Leviton WT899-I 20-Amp 125-Volt SmartLock Pro Slim Weather-Resistant and Tamper-Resistant GFCI Receptacle, Ivory 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. Reduced depth of SmartlockPro Slim GFCI makes it easier to install in any electrical box, even shallow ones. Terminals allow for easy wiring options  back and side wire capable. Trip threshold meets or exceeds UL requirements for tripping time. Limited 2-year warranty