Adaptil Electric Dog Diffuser, Starter KitIt's the secret to happy dogs! The Adaptil Electric Dog Diffuser is a natural product proven to comfort both puppies and adult dogs using a discreet plug in to bathe the home in a synthetic copy of the canine appeasing pheromone. The diffuser should be plugged in inside the room where your dog spends most of his time. Adaptil Refills can be purchased and replaced as required; up to 5 refills may be used before replacing the diffuser unit. Key Benefits