Metered Automatic Air Freshener Aerosol Dispenser. Fully programmable time settings for lower or higher traffic areas. Wall mounted metered aerosol dispenser with sleek design, easy to refill (Refills Sold Separately). Night and day light sensing modes. Longer lasting battery life, Double AA - (Batteries Sold Separately). Metered air freshener is ideal for restroom, college. schools, hospitality, food service, transportation and more.