Constructed of durable and weather resistant high impact ABS plastic, this large heated pet mat is designed to automatically heat to your pet's body temperature range to keep them warm during the cold season. The mat is thermostatically controlled and operates automatically to maintain your pet's body temperature. It has a built-in red indicator light showing when the unit is operating, a heavy duty anti-chew cord protector, and carries a one year warranty. It has 100 watts of power and is 24" x 29".