This EMS is an absolute must-have for worry-free adventures! This impressive 50 Amp surge protector comes equipped with an onboard Electrical Management System (EMS) that stabilizes electricity, protecting your RV and onboard equipment from voltage fluctuations and power surges. With a high-performing fault detector, it identifies faulty power and offers multiple protections, including over/under voltage, open ground, open neutral, reverse polarity detection, and more. Durable and built to withstand tough weather conditions, this surge protector will become your trusty companion on the road, saving you from potential disaster. We don’t plug in anywhere without it; it’s helped us to discover incorrectly grounded electrical pedestals which we would’ve plugged into unknowingly!