Round KozyBird Oasis 11 in. diameter bird bath heater mat provides 95 Watts for bird bath ice melting. This KozyBird bird bath heater won't let falling temperatures put the deep freeze on your bird bath birdwatching activities. There's no need to replace your existing birdbath. Simply place this well designed heater into the bottom of any birdbath, plug it into a standard household outlet and extend a warm welcome to your feathered friends. Crafted of flexible thermoplastic materials, it conforms to the contours of the birdbath. Thermostically controlled heater prevents ice formation and the weather-resistant polymer material resists corrosion, scale, and won't rot or crack. Five-year material and workmanship warranty by manufacturer. Exceedingly safe to operate, the heater and thermostat are completely sealed in a single-piece polymer resin. Thus, there are no exposed electrical elements, so birds can walk on the heater in complete safety.