This high capacity renewable dehumidifier has been designed to adsorb moisture from small, enclosed areas. It will help protect clothes and valuables from the damaging effects of mold/mildew and moisture rot. It is 100% renewable and needs no power to operate. Just hang the Gurin unit in a closet, or you can place it in other small, enclosed spaces, and it will start to adsorb moisture. There are no batteries required or cords to plug in, the unit works without power.