Adaptil calm diffuser + refill 1 month from Ceva-Sac is a product that helps your dog to be safe and calm at home in situations such as when left alone, when there are loud noises, visitors or fears. Consistent use of Adaptil gives your dog a continued sense of security. Each diffuser covers an area up to 70 m2. The diffuser must be checked monthly and renewed every 6 months to ensure optimal effect. It is recommended to screw the container into the diffuser and connect it to a socket. Keep the diffuser plugged in at all times. Avoid plugging the diffuser under bookshelves, behind doors, curtains, or furniture because it will not work properly. Store in a cool, dry place, away from heat and moisture.