The Hughes Power Watchdog Smart Bluetooth Surge Protector is a "smart" RV surge protector. It has Bluetooth connectivity so you can monitor live park power conditions on your smartphone using Hughes mobile app available on iOS and Android platforms. This allows you to wirelessly monitor voltage and current draw on your smartphone. It offers complete LED park power diagnostics with wireless fault alerts and you can set custom alert thresholds. The surge/spike unit is replaceable if you get hit by a large spike, so you won't need to replace the whole unit.