Each package contains 2 calming diffuser pods, providing a total of up to 60 days of calming support for your cat. The Harmony Pet Cat Calming Home Diffuser is portable and easy to use—no plugs, batteries, or cords required. Each diffuser pod is designed to cover a room of up to 750 sq ft, offering calming benefits for approximately 30 days. The calming pheromones in the Harmony Pet diffuser have been studied for their effectiveness in promoting a more relaxed environment for cats, helping to reduce stress-related behaviors.