Thermostatically controlled to help maintain pet's body temperature (100-105°F).
Constructed of durable, weather-resistant, high-impact ABS plastic. Custom built-in red indicator light shows when unit is operating. Heavy-duty "anti-chew" cord protector. Designed for indoor or outdoor use on hard, flat surfaces. Includes faux lambskin fleece cover.

Small measures 13"x19", 60 watts; Medium measures 17"x24", 70 watts; Large measures 24"x29", 100 watts.