Is your cat showing signs of stress? Is she urinating on the bed and carpet or scratching the furniture and door frames? These behaviors can be signs that your cat is stressed. Comfort Zone diffusers dispense a drug-free vapor. They are a veterinarian-recommended solution to help keep your cat calm by mimicking her natural calming pheromones. These natural pheromones help to create a calming environment and reduce your cat's destructive behaviors. It is diffused into the air and signals to your cat that the area is safe and familiar, making her feel more comfortable, safe, and happy. Plug in a diffuser in each room your cat roams. Replace the refill every 30 days and the diffuser unit every 12 months. Comfort Zone products are SAFE and certified to UL standards. Suitable for all life stages.