With the addition of a K&H Pet Bed Warmer, any pet bed can provide comfort and warmth. It can be placed inside virtually any pet bed and is easy to use. Just plug it in! It will become your cat or dog"s favorite place to nap. Dual thermostats regulate temperature using only 13 watts. Pet is comfortable up to 102 when lying on a heated bed. The heater is set to keep the surface 12 to 15 degrees above ambient air temperature and warms to a pleasing 102 degrees when the pet lies upon it.