None 25-Watt Granite Thermal Bowl 1.5 Gal.

A whopping 1.5 Gal. Thermal-Bowl makes water available for pets in even the most extreme cold temperatures. Thermostatically controlled Thermal-Bowl is the answer to freezing water bowls. Just plug it in and your pet's water will remain open all winter. All electronics are safely sealed inside and the cord is steel wrapped to prevent abrasion. These bowls are only 25-Watt for extremely low energy consumption. One year limited warranty.