30 amp Surge Protector for RV and Travel Trailer: Identifies faulty park power plus offers 4100 of surge protector. Protects your RV from dangerous high and low voltage levels as well as power surges.Power Watch Dog: Diagnostic LED, Provides fault indication when you connect the wire to the power base, Protects Against Wiring Issues, Protects against faults for reverse polarity, open neutral, and other wiring issuesDesigned with Easy To Use Handles: Contoured grips make plugging and unplugging easier.Reliable Surge Protector Circuit: 3 level complementary Surge Protector Circuit which composed of TVS, MOV (metal oxide varistor), GDT (gas discharge tube), with minimum 4100J energy absorbing capacity, could protect your devices much more quickly and reliably than other 1 level MOV(metal oxide varistor) Surge Protection Circuits.Product Function:Circuit Analyzer with LED Indicator Lightrv Accessories and camper accessoriesall-weather use and waterproof IP 67Specifications:Input Voltage: 125VAC; 60HZMax.Current: 30AMax.Power Rating: 3750WSurge Protection Rating: 4100 Colour: BlackMaterial: PlasticPackage Contents:1 x Rv Surge ProtectorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.