● SUS444 white gold liner (Patent No.: ZL2021 2 1959674.6) ● LCD display, intelligent programming 7 days *24 hours a day, automatically controls night operation and weekend downtime ● Rated working pressure 1.1MPa ● Step cycle ●50mm thick fluorine-free polyurethane insulation ● In-immersed flanged INCOLOY heating elements ●T&P safety valve ●ECO high temperature limit switch ● National level 1 energy efficiency ● The liner is guaranteed for six years, and the parts are guaranteed for one year