Size: N/A Assembled Product Length: N/A Assembled Product Height: N/A Assembled Product Width: N/A . The Moisture Magnet dehumidifies damp areas by absorbing moisture from the air • Relative humidity is lowered and the air is dried to a level that prevents formation of mildew and odours • Water accumulates safely and conveniently in the collector tray • When the crystals have expired, replace the bag with a new Moisture Magnet refill • Since Moisture Magnet requires no electrical outlets or batteries, it conserves energy and can be used in remote locations • Ideal for basements, cottages, boats, and trailers