Product details:

The Purrified Air Discount Group A consists of one complete filter with filter media cartridge, a second cartridge, so you are never caught short. They maintain potency until opened. You've tried it all: Sprays, liquids, carbon pads, cleaning out the litter five times a day. Yet the smell remains. Nothing is more effective against cat odor that Purrified Air. Fan replaced free if it EVER fails. Filter media cartridges contain 2.2 pounds (one kilogram) of an odor destroying proprietary mix of carbon, zeolite, catechin and negative ion ceramic balls which lasts 4 to 7 months. Made in the U.S.A. by Purrified Air, from American and international parts. Worst problem you may have is that you have to set a reminder to clean the litter box. $164.97, a savings of $20.00 over separate item pricing of $184.97.