Technical specifications: Operation: rotary knob Power: 16KW/20KW/24KW/32KW/36KW (25 ℃) Hot water volume: 8L/10L/12L/16L/18L Flow rate: 2.11 GPM/2.64GPM/3.2 GPM/4.3 GPM/4.8 GPM/ Gas type: Liquid Propane Gas (LPG) Rate gas pressure: 2800Pa Fire -extinguishing: Automatic fire extinguishing with electrical pulses Exhaust options: Automatic exhaust gas Applicable water pressure: Min.0.02MPa, Max.0.8MPa, Starting pressure: 0.015MPa Gas line (inner diameter): F 95mm oil-resistant rubber hose Color: gray/white Display: LED digital display delivery: 1x water heater 1x shower head and shower hose 1x English operating manual.