Saves nearly 75% of electrical energy, has high efficiency, operates safely 24 hours a day, generates and stores large capacity hot water, providing a comfortable hot water experience. Easily provide hot water and soak in hot springs at home. D-type heating coil, effectively expanding heat exchange area and improving heat exchange efficiency; Stainless steel 304 inner liner, corrosion-resistant, high-pressure resistant, safe and reliable; The outer tank of the water tank is treated with electrostatic powder spraying, which is beautiful and durable, and not easy to rust.