This is a Feliway Friends Diffuser for Cats with 48ml Refill. Feliway Friends is an easytouse solution to reduce conflict between cats living together, and avoid signs like fighting, chasing, blocking, staring. Helps your cats get along better at home. Continuous effect, ensures constant harmony. Use Feliway Friends for introduction of a new cat or kitten, fighting and aggression between cats in the home & adoption. Clinically proven, Veterinary used and recommended, Feliway Friends helps alleviate the signs of cat conflict. Just plug and play: screw the vial onto the diffuser unit and plug it into an electric socket. Leave the diffuser switched on continuously to keep your cats in harmony. Each diffuser refill covers an area up to 70 m2. Avoid plugging in the diffuser under shelves, behind doors, behind curtains, behind furniture, as it will not work.