The Deluxe Thermo-Kitty Bed has a dual thermostat 4 watt heating unit buried within its thick premium polyfil pillow base. It warms the surface 10-15 degrees above ambient air temperature when not in use. When your pet lies in the bed it warms to your pet s normal body temperature to keep them cozy warm. The heater is removable making this cozy cat bed perfect for all seasons. The removable cover is completely machine washable and easy to keep clean. The attractive leopard print is a kitty favorite. Indoor use only. This cat bed heated has been tested & certified by MET Labs to exceed USA/CA electrical safety standards. One year warranty.