This 50 amp Surge Guard product monitors shore power continuously and shuts off when it detects power surges, open ground, open neutral, low or excessive voltage, miswired pedestals, reverse polarity, or elevated neutral current conditions that could damage electronic equipment in your coach. Like its 30 amp partner, the 50 amp hardwire unit is permanently installed within the bay of your coach, preventing potential theft and damage from the elements. Optional Remote LCD Display conveniently and remotely monitors RV electrical power.