Check the listing for details. Comfort Zone Diffuser Kit for Multi-Cat Calming With Pheromone Refill. Condition: New. Listed at 19.99 USD. This is for 1 Comfort Zone Diffuser Kit for Multi-Cat Calming With Pheromone Refill 😺 VETERINARIAN RECOMMENDED: Comfort Zone is a veterinarian recommended solution to keeping cats, safe, happy, and calm.😺 HOW TO USE: Plug diffuser upright into a wall outlet with vents facing up and never into power strips. Improper use may cause the diffuser to become discolored, increased odor, or cause leaking.😺 CERTIFIED: Diffusers certified to UL safety standards and include a shut-off feature to prevent overheating and a rotatable plug to ensure upright placement in any wall outlet.😺 HARMONIZE YOUR HOME: Our Starter Kit include 1 diffuser and 1 refill to blanket one room of your home with harmonizing pheromones to ease multi cat tension for up to 30 days.😺 DRUG-FREE: Drug-free solution that helps to calm your stressed cat and reduce urine spraying, scratching, and other unwanted behaviors.😺 MULTI-CAT TENSION: Use to help reduce multiple cat household tension, fighting, and stress. Creates a calming, relaxing environment for both Single and Multi-Cat homes.😺 TRUSTED CALMING: Our trusted cat calming pheromone formula refills work in all Comfort Zone diffusers and last up to 30 days.😺 AWARD WINNING: 2020 Product of the Year Winner - Cat Care Category.😺 SATISFACTION GUARANTEED: We are so confident your pets will find stress relief from our products that we offer a satisfaction guaranteed or your money back. Results may vary by each individual cat. Shipping $5.00