Automatically test the GFCI every time the RESET button is pushed in. The GFCI will not reset if the GFCI circuit in not functioning properly * Patented lockout feature for added safety prevents RESET if the device is wired incorrectly or if the GFCI protection is lost * Dual Function LED provides indication of power availability and also alerts to a line/load reversal during installation * Expanded wiring options with nine back-wire holes. Two for each line and load connection plus one for ground with an internal clamp * Trip threshold meets or exceeds UL requirements