Powerful deodorizing effect lasts for 2 years! A maintenance-free deodorizer. Powerful deodorization "from the source of the odor" with the three powers of activated carbon deodorization + bio-deodorization + silver AG + antibacterial. [Usable Locations] Refrigerators, shoe cabinets, toilets, etc. *Effective in moderately sealed spaces. New, unopened product.