One 30-day refill cartridge. Simply insert, plug in, and activate. Introduce lasting calm to your home with the Angels' Eyes Calm Cat Calming Diffuser Kit, a vet-developed, drug-free solution designed for cats of all ages and life stages. Powered by a unique 2-in-1 pheromone formula combining F3 Feline Facial Pheromone and Maternal Appeasing Pheromone analogues, this diffuser works continuously for 30 days to help reduce signs of stress without any sedation or medication. Each kit includes one plug-in diffuser unit and one 1.6 fl oz refill bottle, covering up to 750 sq ft, making it ideal for both single and multi-cat households. It helps address common stress-related behaviors such as hiding, scratching, fighting, urine marking, and excessive meowing, while promoting bonding and harmonious living. The odorless-to-humans formula delivers a full calming signal to your cat without any detectable scent for people. Simply screw in the refill, plug into a standard 120V outlet, and let it work. Replace the refill every 30 days and the diffuser plug every 6 months. Keep out of reach of children. Read all safety information before use.