The ALZOO™ Plant-Based Calming Diffuser Kit helps provide comfort to cats experiencing stress due to fireworks, thunderstorms or changes to a routine or living situation. Stress can result in excessive meowing, destructive behavior, marking and nervousness. No synthetic pheromones Plant-based active ingredients Great for anxiety, marking, and more Lower stress that can result in excessive meowing, destructive behavior, marking and nervousness Covers an area up to 500 sq ft Effective up to 1 month Recyclable FSC certified printed box Cruelty Free Designed for: Cats Directions: 1. Unscrew refill cap and insert bottle into device. 2. Plug in the electrical outlet. To avoid leakage, always keep solution and unit in upright position. 3. For best results, avoid plugging in behind furniture, shelves, or behind curtains or large objects. After using up the first refill of the kit, available for the following purchases just the refill: ALZOO™ Plant-Based Calming Diffuser Refill for Cats Only use ALZOO™ Plant-Based Calming Diffuser Refill with the ALZOO™ Plant-Based Calming Diffuser Plug-In Content: Includes 1 diffuser plug-in and 1 diffuser refill