[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 Protect your RV, camper, trailer, truck, motorboat, yacht, and mobile home from electrical surges with the Dumble RV Supplies 50 Amp Surge Protector for RV equipment. Designed to absorb energy bursts that can cause short circuits and even fires, this camper plug adapter adds a protective screen that will give you peace of mind. Plug into your 50 amp 14-50R outdoor outlet. Green and blue LEDs will light up indicating a protected connection. Attach your RV camping power cord for a reliable and safe electricity link. 3.5-inch (8.9cm) total depth has 1.4-inch (3.6cm) long copper prongs for optimal conductivity and security. Contoured shape makes it easy to plug and unplug this handy RV accessories surge protector. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.