Specifications50L Storage water heater  Blue Diamond enamel coating inner tank - Corrosion resistance and anti-rust  Water Proof  degree IPX4 - Reduces water leakage riskCFC free polyurethane / Cyclopentane insulation: Complete protection design against  radiant loss for more energy saving  Double overheat protection: Dry firing prevention and double wire cutout. Magnesium anode: with extremely long life span protects inner tank from corrosion and rusty. Multi functional  Safety Valve: with high hydraulic pressure protection for over pressure prevention to ensure the safety of performance.   Compact design and easy to install. All brackets and mounting accessories are included.   For indoor/domestic use onlyPower 2000W