[With Circuit Breaker] - Our 30 amp RV power outlet box comes with a 30A circuit breaker on/off switch, which can automatically cut off the circuit to protect the circuit in case of overload. No separate installation is required, making your operation more convenient and safer. [Professional RV Outlet Box]30 Amp 125 RV circuit breaker box is made of heavy-duty cold-rolled steel. This outdoor electrical outlet panel features 30 amp outlets, each protected by a circuit breaker, making it easier and safer to use on construction sites and RVs. [LARGER SPACE] - There is enough space to close and lock the door while plugging in the 30A RV power cord, even with a large handle or heavy-duty 30 amp rated wire. [Weatherproof and Durable] - This 30 amp RV outlet panel shell adopts the entire spray process and double rust-proof materials, which has strong corrosion resistance, so it is waterproof, Lightning-Pattern-proof, fire-proof, dust-proof, UV-proof, and has a longer lifespan long. Safe to use outdoors. [Wide Application] - The 30 Amp RV outlet box is specially designed for outdoor service, meeting the temporary power needs of outdoor construction sites, RVs, energy trams, motorcycles, etc., more conveniently. Material: abs colour: Black Package Contents: 1 set car distribution box (American style)