This is an accessory specifically designed for the ScoopFree SmartSpin Self-Cleaning litter box. Say goodbye to bad odors with ScoopFree SmartSpin Self-Cleaning Deodorant. It fights and neutralizes litter box odors with the fresh scent of essential oils. Remove the label and place one deodorizer in the front compartment of the litter box. One deodorant lasts for 15 days, the product is sold in 2-packs which gives a month's shelf life.Facts about ScoopFree SmartSpin Self-Cleaning Deodorant 2-pack:Accessories for ScoopFree SmartSpin Self-Cleaning litter box. Removes bad odors. Sold in 2-pack.One deodorizer lasts for 15 days.