Standard aerosol dispenser offers automatic odor control for every budget. TC Air Neutralizer refills (sold separately) provide odor control through proprietary Microtrans technology for 30 to 168 days. Air Neutralizers with Microtrans blend chemistry and physics to lock onto malodor molecules and transform them into a neutral base, eliminating unavoidable odors in the washroom. This Standard Aerosol Economizer dispenses every 15 minutes for 30 days (standard refill) or 90 days (Microburst 9000 refill). Long-lasting refills (sold separately) mean less labor and packaging waste. Dispenser runs on two D batteries (sold separately) for up to 36 months.