• Aerosol dispensing, odor-control system automatically alternates between two complementary scents for renewed freshness you will notice every day • Alternating scents eliminate fragrance fatigue • You decide which fragrance will spray and when, thanks to the programmable freshness • Alternate fragrances hour to hour, night and day, or day to day • Cost-effective solution delivers high-quality oils dispensed through Microburst technology for longer-lasting performance • One highly concentrated, refill set for the Microburst Duet Dispenser replaces three standard refills and lasts up to 180 days between refill changes, significantly lowering labor and odor management costs • All refills contain MicroTrans odor neutralizer • Refills are sold separately