Odor Assassin has two simple claims to fame. They work - eliminating offensive airborne odors! And, the scents are wonderful. Whichever formula you chose, you’re getting a product that performs. They are made from the same formulas that institutions from landfills to nursing homes have been using for over 30 years to solve their most challenging odor problems. Household and Automotive odors are easy! Odor Assassin metered refills deliver continual long-lasting odor control in choice of seven delicious scents. All fragrances contain patented odor control ingredient that truly eliminates offensive malodors! 7.25-oz aerosol can delivers 3000 metered sprays which lasts 30 days when dispensed every 15 minutes. Refills fit into the “Sensor Dispenser” and most other automatic dispensing cabinets. The Sensor Dispenser (39-122211) is durable, industrial quality dispenser features 24 hrs or light only option operation; spray interval of 5, 15, or 30 minutes; empty can reminder; low battery monitor with indicator light, and easily wall mounts. Use one dispenser for every 4000-6000 cubic feet. Uses two D batteries - not included.