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 Smart lock Pro 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