This automatic continuous air freshener lasts for up to 60 days on a single cartridge. The continuously dispensing system works around the clock. This system is low-maintenance. It's self-powered (no batteries to replace) and changing the cartridge is a snap with one-minute installation. This commercial, non-aerosol air freshener is designed to fit into compatible Kimberly-Clark Professional dispensers. They are ideal for business or industrial restrooms.