Desiccant principle: electronic moisture box desiccant host using high polymer environmental protection type moisture absorption material, using the shape memory alloy system, unique patented technology, with intelligent microcomputer control system. Power off automatic moisture absorption design, can still use the chemical absorption and moisture complement function to continue to desiccant, humidity increase within 24 hours no more than 10%. Don't get damp, no fever, no dripping. Energy saving, long service life.