Silica-gel desiccant can be used to protect camera, camera lens, microscopes, telescopes, audio and video equipment, CD, etc from mold. Keep photographs, stamps, currencies collections, optic equipment free from mold and deterioration. When silica-gel turns to pink, it can be recycled by heating in microwave oven with low or middle power, it takes 5~8 minutes until color turns blue. Also widely used for protecting precise instruments, such as leather, shoes, clothing, food, medicines and household appliances. Can be placed in closets, coat or sweater inside the box to prevent mildew, etc. Instructions for use: 1. The silica gel desiccant can be used to protect cameras, lenses, microscopes, telescopes, audio-visual equipment, records, tapes,video tapes and computer floppy disks, etc., in order to prevent mold growth. 2. And protection films, color negatives, color slides, photographs, valuable collections such as stamps or money to avoid mildew and deterioration. 3. Can be placed in closets, coat or sweater inside the box to prevent mildew, etc... Using Tips: When turn pink color, it can be placed in the sun below the sun drying / baking into the microwave 40 seconds attention to resist fire, microwave heating time between 0.5-1.0 minute, and small fire, must not be too long!!! moisture beads will dissipate it back to blue, and then recycled. proposed multi-buy boxes, and used together, the better