SmartlockPro® Self-test GFCI receptacle with blank face with LED Indicator (with self-grounding clip) (20A feed-through rating only). Provides continuous ground fault protection detects and trips on actual ground fault even when self-test is being conducted. Auto-monitoring exceeds the UL requirement. Auto adapts and shifts to more frequent testing if potential problem is detected. Testing frequency regularly updates protection status. Electronics are designed to minimize any false triggers.