Feliway works by releasing natural pheromones that reproduce the natural markings that the cat is used to making himself by rubbing against furniture. This marking allows him to define his territory and indicates that the place is safe. In the absence of these marks, the cat's anxiety increases and leads him to adopt undesirable behaviors.The Feliway diffuser can also be used in addition to the Feliway spray against urinary marking and scratching.InstructionsPlug the diffuser into the room most used by the cat and leave it plugged in permanently. In large houses, several diffusers can be installed.A 48 ml refill lasts 30 days.CompositionStructural analogue fraction of the cat's facial pheromones: 2%