... drugs, precision machinery equipment, camera, lens, semiconductor device etc, and prevent them from oxidation, mildew. FEATURE: «20-60%RH ... N2) gas replacement and combination N2 with other substance«Sturdy and durable shelf is movable up and down and slip layer board ... , no condensation dripping, absence of fan noiseSPECIFICATIONS ModelFCM728-2(A)FCD728-2(A)FCDE728-2(A)Humidity Range20%-60%Rh10%-20%Rh1 ...