TimeMist Air Sanitizer Refill, Unscented 6.2 Ounce Aerosol Can (91-8001TM) Kit includes one air sanitizer dispenser and one can of air sanitizer. Kills airborne bacteria making the air you breathe healthier and cleaner. One refill will cover 6,000 cubic feet for 30 days, 24 hours a day when set at 15 minute intervals. Operates on two "C" batteries (sold separately).