... , Biotechnology, Food, Medicine, Optical and other industriesSuggested Humidity Level For Different Items: Relative humidity RH%Optimal preserved articles50% - 40% ... musical instruments, article products, ancient objects, dresses, leather articles, gold and silver tensils, TCM, medicines, tea, spices, superior foods and ... 50/60HZ or other customized power requirement. Drying Cabinet For PCB,IC devices