Ag Bio System removes strong odors and keep strew flavor of food! 1)Deodorizing Function: With the use of a biocatalyst, odors molecules is disintegrated. Thus, it can prevent plain-flavored food from being affected by strong odors. 2)Anti-Bacterial Function: Ag ion can restrain bacteria growth inside the refrigerator. It can keep fresh food longer. 3) Maintenance Free: No cleaning and replacement of filters are needed. It also consumes no electricity.