... Shower water heater with patent technology 1.CB,CE & CCC approved 2.No wait, no waste, no limit 3.Durable Shower water ... heater details:1.Key Features:1) Safe, convenient, energy saving, environmentally friendly tankless water heater ... service life.9) Less prone to hard water, sediment, or mineral problems.2.Specifications:Rated ... 40' HQ: 2,800pcs Instant shower water heater (DSK-G9)