When a cat feels safe in her environment she will deposit pheromone (scent) marks on furniture or other prominent objects. These marks convey a message of well-being & a feeling of safety. By mimicking the cat´s natural facial pheromones Feliway creates a state of familiarity & security in the cat´s local environment. FELIWAY is available as a diffuser & as a spray & can be used in the following situations To calm your cat if he is showing symptoms of stress (disruption of environment) To reduce stress when there is disruption to your cat´s environment To make your cat feel safe & secure Important Please make sure that the diffuser does not cover furniture or curtains as this can run the risk of building up bits/blockages which may prevent the pheromones from dispersing in the room properly. Always consult your vet if your cat is showing signs of stress. Your cat´s problem may be of a clinical origin & may require further treatment. The refill is especially designed for the FELIWAY Diffuser. The product cannot be guaranteed if a different device is used with the refill. Similarly the electric device should not be used with another substance. Please note This device is designed for use in France therefore a power adapter for use in the UK is included free of charge.