This high-capacity renewable dehumidifier has been designed to absorb moisture from small or enclosed areas. It is 100% renewable and needs no power to dehumidify. It helps protect clothes and valuables from the damaging effects of mold/mildew and moisture rot. Just hang the Eva-Dry unit in a closet or in other small, enclosed spaces and it will start to absorb moisture. There’s an indicator window with special “moisture meter crystals” that change from blue (when dry) to pink (when wet) to indicate when the unit needs to be renewed. The unit will absorb approximately 8–10 oz. of moisture (depending on humidity levels this should take between 6–8 weeks). Once the moisture has been adsorbed, it cannot leak or spill. This unit uses a specially engineered, crystallized silica gel that is odorless, nontoxic and completely safe. When the indicator crystals turn pink, it’s time to renew the unit. Remove the unit from the area where it’s adsorbing moisture and plug it into a power outlet in a well-ventilated area. A built-in heater warms the crystals, allowing them to expand and release the moisture as water vapor into the outside air. It takes about 12–14 hrs. to completely renew the unit. When the indicator crystals change from pink to blue, the unit is ready to adsorb another 8–10 oz. of moisture. The crystals remain active for 10 yrs. and the unit includes a 5-yr. limited manufacturer’s warranty on all EDV500 units.