... / 1.5 VA is suitable for various areas use 5. This machine is suitable for safekeeping: camera, tea, food, ... .Optimal Preservation Parameter TableRelative humidity RHOptimal Preserved Articles40% - 50% Chinese paintings, antiques, paper money, stamps, ancient volumes ... , and etc.Below 30% Reagent, seeds, articles under research, special chemical medicines, precise eletronic components, perfurme, and ...