Powered by a 300 watt PTC heater element, this pet house heater has no sharp edges and can efficiently heat small to very large (75 cu. ft) dog houses and kennel spaces. This new updated model has the thermostat on the top for easy access and precision adjustment. Another new feature is a quiet fan that helps distribute the warmth. An internal heat shield keeps the unit warm but not hot. A thermo sensing bulb provides accurate temperature control. A 7-foot stainless steel heavy duty protective cord spring discourages chewing. The unit is easy to mount, even in “Igloo” style dog houses. Warm and worry free.  10” L x 10” W x 4.5” D.