Total electrical protection for your RV. Protects your RV bumper to bumper from faulty park power. Transfers to either shore power or generator automatically when energized. In the event both shore power and generator powers are available, generator dominates after a 30 second delay. Once the generator is shut down, shore power activates after a 2 second delay. Internet and Catalog Exclusive. | Southwire Surge Guard Automatic Transfer Switch with RV Power Protection