It helps solve all common signs of stress to get the better peace of mind Conveys messages that help calm cats feel comfortable and safe at home They provide serenity and favor harmony between cats It contains the best of feline pheromones for improved efficiency It contains a 48ml refill Plug it into the favorite room of your cat For best results, keep the diffuser connected day and night Renews replacement approximately every 30 days The refill is compatible with all Feliway diffusers range We recommend renewing the diffuser every 6 months of continuous use or every 6 spares