[Minimize Risk]: Allow Dumble RV Supplies Power Surge Protector for RV 50 AMP Plug to absorb high voltage spikes to protect your camper and electrical equipment; Minimize the possibility of damage or fire caused by lightning strikes or sudden energy surges [Optimal Protection]: Rated for 45000A maximum spikes of 3,150 Joules, this RV surge protector 50 AMP adapter is made of integrated copper material that ensures good conductivity and security [Fits RV Outlet Receptacle Box]: 4-inch (10.2cm) tall by 3-inch (7.6cm) wide power adapter plug fits your 14-50R receptacle and your 14-50P RV power plug; Adds only 2.1-inch (5.3cm) depth for increased stability and safer connection [Easy To Use]: Plug the 50 amp male (NEMA 14-50P) end into the camper receptacle outlet; Green 'Power' light indicates electricity is running, while blue 'Surge' light signifies the connection is protected; 50a surge protectors do not check for correct wiring; RV circuit analyzer not included [For Home and On-The-Go]: Whether at the local campground with your RV or travel trailer or just at home charging your electric car, rely on this RV power cord surge protector