RV Surge Protector for RV Camper Trailer 30A 125V Up to 1050 Joules Surge Protection: It can provide up to 1050 joules of surge protection to avoid permanent damage to the RV caused by the failure of the charging pile circuitwiringin the campsite, and relieve your worries. CircuitAnalyzer: LED diagnostic indicator on the top and clear and easy-to-read fault diagram at the bottom. Analyze the camping ground line condition before plugging in the power cord of the RV. When the indicator shows a wrong connection, it will display a red light and the power cord cannot be connected at this time. Conversion: 30Amp male to 30A female adapter, NEMA TT 30P to NEMA TT 30R, 125V or 3750W. Perfectly adapt to various types of RVs, keep the power supply stable at all times, and ensure the safety of electronic equipment. It is a must for every RV owners. Scientific Design: ergonomic handle design, easy to operate, small in size and easy to carry. The shell is made of high-quality flame-retardant materials, which can withstand all kinds of harshweather. The plug is forged from thick copper sheets (thickness up to 1.8mm), which has good electrical conductivity and prevents short circuits to ensure safe use. Package: Includes a RV surge protection plug.