【30 AMP SURGE PROTECTOR FOR RV】 The surge protector can indicate wiring faults when you connect your electrical cord to the power pedestal, offers up to 1,050 joules of surge protection. Protects your RV from power surges. 【30 AMP MALE TO 30 AMP】 30 Amp male (NEMA TT 30P) / 30 Amp female (NEMA TT 30R). 【LED LIGHT INDICATIOR】: Our adapter circuit analyzer with LED indicator light. When you use it, the LED light is on to show the power status, reminding you whether the wiring is connected correctly, and protecting your RV from damage. 【ENERGY-SAVING】 It has the of single-chip microcomputer energy-saving function, which makes energy-saving easier. And the advanced charging and discharging circuit design make RV batteries and this product have a longer service life. 【Good After-sale Service】 WARMQ devote to providing our customers with high-quality services and products. Please contact with us if you have any problems. Warm reminder: Please do not exceed the rated power of 125V/3750W.