1. A all in one surge protection RV 50A socket with a color LCD screen for real-time display of voltage, current, power, kWh energy, and operating time. Can directly replace RV surge protection sockets and energy meters. 2. 16000Joules has strong surge protection capability, which can maximize the protection of your RV's electrical safety. 3. Easy to use plug and play, no need to read the manual too much, intuitive. 4. Equipped with 2 surge protection status lights, it intuitively informs you of the current status. 5. The multi-functional surge protection RV 50A socket has no limit on the number of uses and will not cause other energy losses or heat generation. The internal direct connection method is safer and more reliable.