A reliable way to monitor and regulate your RV voltage! Surge Guard Voltage Regulator automatically detects high and low line voltage. Voltage Regulator boosts voltage to an acceptable level during times of low power, preventing low voltage damage to your RV appliances and electronic devices. Don't worry about low park power again - State-of-the-art solution for low park power! Provides a stable regulated and reliable source of power. Easy-to-read LED status and fault indication panel. Helps prevent low voltage damage to appliances. Fully automatic, continuously monitors line voltage conditions. True bypass mode - input voltage is equal to output voltage. Increases voltage to an acceptable level. 10% voltage increase. Boosts as low as 95V. Optional mounting bracket for inside the RV. 552715 - is the 10175 mfg model, 120/240V, 50A model.