Are your cats fighting, spitting, or showing signs of tension and conflict? These behaviors may indicate stress or anxiety in your cats. Cats are very territorial and the arrival of another cat in a household where several are already present can cause stress and a sense of threat. Comfort Zone Multi-Cat Diffusers diffuse a non-medicated vapor that mimics natural pheromones synonymous with calming in cats, creating a relaxing environment that helps reduce tension and conflict between your feline companions. These pheromones are diffused into the air and signal to your cats that the place is safe, which helps them feel more comfortable. Use the Comfort Zone Multi-Cat Broadcast Kit if your cats are fighting or showing signs of tension and conflict. Plug in a diffuser in each of the rooms where your cats walk or spend the most time. Replace refill every 30 days and diffuser every 12 months. Our products are safe and certified to CE/UKCA standards. Use only 230-240V AC outlets in good condition. We attach great importance to the comments and questions of our customers. Visit our website to contact the customer support team at Comfort Zone.