The water flow sensor can be sensitive to changes in water pressure, and it can work normally even when the water pressure is as low as 0.04MPA. The 304 stainless steel waterway extends to 1.8m, which improves the stability of the heater and stabilizes the water temperature. Made Made of high quality stainless steel and copper, it has high hardness, wear resistance and durability, is not easy to damage and has a long service life. 3 seconds rapid heating, no waiting, no water storage, no preheating, energy saving, environmental protection and high thermal efficiency. It has multiple protections such as leakage, dry burning, water and electricity isolation, and it will automatically cut off the power when overheated.