Features: 1.3 seconds that is hot, really thermostat without waiting 2.Safe and intelligent, no water flow stops heating 3.0.1 second automatic power-off when leakage 4.It heats water as the water passes thru the unit, instant heating, so you can use the hot water as you like 5.6500W output tankless electric water heater eliminates long time waiting 6.Constant temperature maintains the optimal water temperature for you 7.Easy to install under the bathroom or kitchen sink for washing dishes, food, clothes, faces and other functions. 8.Suitable for universal water pipe: 1 / 2 inch diameter (inflow or outflow) 9.Various protections: Leakage protection, IPX4 waterproof, Dry heating protection, Water-electricity isolation, Auto power-off at inactive state, Over-temperature automatic power-off.