The K&H Pet Products birdbath de-icer safely maintains open water to 20-degree below zero F * Natural color and 18-inch cord blend in with nearly every birdbath * May be spray painted any color; the existing durable enamel finish is easy to clean * K&H Pet Products birdbath deicer is thermostatically controlled using only 50 watts * MET Listed * May be spray painted any color * Safely maintains open water to -20 degrees Farenheit * The durable enamel finish is easy to clean * Thermostatically controlled using only 50 watts; UL-listed