The Midea Square Series 50L Electric Water Heater D50-20T is CE Certified, has Eco Mode to ensure maximum power savings. Has a 3 Power Setting. Enamel Coated tank to ensure maximum insulation preventing heat loss through conduction. Enamel Coated Heating element this reduces corrosion to the element thus making suitable for areas with salty water. ELCB Protection to prevent earth leakage. Waterproof the unit has an Ingress Protection Rating of 44. Dry heating protection the unit has a pressure switch to prevent dry heating.