The KIMCARE® Continuous Air Freshener system is the sensible way to keep your restrooms smelling fresh. There are no batteries to replace, it's completely self-powered and provides continuous air freshening 24 hours, 7 days a week. Each cartridge lasts for 60 days. Dispenser is easy to use and requires no program, unlike other air freshening systems.- Air Freshener, Summer Fresh, For Use in Dispenser #92620 or #92621, 6/cs (Products cannot be sold on Amazon.com or any other 3rd party site) (US Only) 14-21 Days