... way, without the use of dryer, easy to use, once and for all. 20% ~ 60% RH accused of wet range, high, ... medium and low 3-sectional adjustment, remain without power for 24 hours, ... ,camera lens,microscope,telescope,CD,positive and negative film,musical instruments,fur,medicines etc45%-35%Non-ferrous metals,parked the baton,semiconductors,printed circuit ...