Helps protect your RV from damaging low/high voltage levels and power spikes and surges. Camco's Power Defenders monitor incoming power and automatically disconnect when dangerous voltage levels are detected, then automatically reconnect once voltage levels stabilize (between 102-132 VAC). Reconnect Delay protects sensitive equipment, such as AC units, by not rapidly cycling power. Water resistant unit incorporates integrated mulitlevel surge protection and diagnostic lights for visual indication of faults.