This Frigidaire 20 cubic foot upright zer includes a superior tight seal that locks in cold air, keeping food frozen for two days if there is a power outage, and the EvenTemp™ Cooling System, with a variable speed compressor that constantly circulates cold air throughout the zer with smart sensing technology that adjusts air flow to maintain a uniform temperature. The flexible interior organization system enables you to easily organize your family's frozen favorites with four adjustable, full-width glass shelves, deep bottom basket, and five spacious door bins.