... 1) Safe, convenient, energy saving, environmentally friendly tankless water heater.2) Patent advanced heating technology.3) On-demand hot water - ... ) Less prone to hard water, sediment, or mineral problems.2.Specifications:Rated power: 6/7/8kwExterior dimension: 365mm×240mm×90mmOptional ... : Qty/20' FCL: 1,232pcs Qty/40' FCL: 2,464pcs Qty/40' HQ: 2,800pcs LCD screen tankless water heater (DSK-G) red