Powerful Charcoal Deodorization that Eliminates Bad Odor Countless holes on the surface of the charcoal will strongly absorb the bad odor. ACTIVATED CHARCOAL filter paper and deodorizing ingredients powerfully eliminate the bad odor in room. Simply put the SADAWAY CHARCOAL DEODORIZER in the room to keep the environment scented and odorless. Large size bottle freshens the air with long lasting effect. Consistent scented smell up to 1-2 months. Might be vary according to environmental condition and room temperature.