Quickly and easily train your dogs and cats to stay out of designated rooms, off furniture, countertops or other unauthorized places. The PetSafe ScatMats come in various sizes to match your specific need. You can extend each of these mats to double the area protected with the help of an extension mat, available in each size (except sofa). Each ScatMat have various settings to adapt to kittens, puppies, cats and small and large dogs. Each ScatMat uses one 9-Volt battery or the ScatMat adapter.