Easy to use Eliminates musty smells Helps prevent mold & Mildew stains Full 360-degree air flow Re-usable and odorless Made with recycled plastic Air removes excess moisture from your Home, RV, Boat, Storage Rooms. Keeps moisture from forming mold and mildew and helps prevent condensation damage. Eliminates musty smells from damp areas. Non-Toxic Salt Based Dehumidifier / Septic Safe Monitor – Re-charge every 30 days. 13oz Refill Crystal included with Unit.