Long-lasting effective odor control for restrooms, hospitals, nursing homes and commercial buildings. Each unit holds one battery-operated fragrance cassette (sold separately) for consistent fragrance release over a 30-day period. Wall mount (tape and screws incl.) or use as freestanding unit. Adjustable vents regulate air flow. Use in rooms up to 600 sq. ft. Off-White. 3¹/₂w x 3⁵/₈d x 7. Sold by the each.