Long-lasting effective odor control for restroom, hospitals, nursing homes and commercial buildings Adjustable Fan Dispenser (RCP 5114) dispense fragrance for 24-hour odor control. Unit holds a battery-operated fragrance cassette (sold separately) for consistent fragrance release over a 30-day cassette. Adjustable vents regulate air flow. Use n rooms up to 600 sq. ft. Off-white 3-1/2w x 3-5/8d x 7-3/4h.