Permanently installed Surge Guard protects your RV bumper to bumper from faulty park power. Protects from the weather and theft and eliminates handling. UL Listed. Automatically shuts off the power when excessive voltage, Low (Less than 102V) and High (Greater than 132V), or open neutral is present. Automatic reset on power restoration. Caution indicator light indicates miswired pedestal, reverse polarity and elevated ground voltage. 128 second reset delay protects A/C compressor. Fits neatly inside RV's electrical compartment. Weather resistant. Joules of surge protection. Easy installation. UL Listed. Optional Remote Power Monitor LCD Display, sold separately. Plugs into remote port on Surge Guard models 34520 and 34560. Conveniently and remotely monitors RV electrical power. Detailed fault screens show 16 information fault screens, incoming line voltages and current being used. Joystick offers easy screen navigation. Stores faults (if any). Plug and Play. Connects to a RJ12 (6 pin) connector cable (included).Not compatible with previous models that do not have a telecon jack.