Pet Heat Mats with Thermostat are a safe and effective way to keep small animals warm. The energy efficient design allows users to select and maintain the ideal temperature for various species of animals. This state of the art thermometer will maintain any pre-selected temperature between 40 degrees F and 105 degrees F. The mat is waterproof and can be used safely indoors or out, in kennels, whelping boxes, dog houses, garages or wherever your pet sleeps. Durable and safe to operate, they're designed to maintain a temperature approximately 37 degrees F above the surrounding air temperature. With an insulated bottom they are much more energy efficient than other heating devices and provide uniform, comfortable heat. 80% more efficient than heat lamps. The thermostat incorporates several unique self-activated safety mechanisms as well such as a high limit setting that self-activates and is relative to the set point of 105 degrees F. Made of durable, high density polyethylene. Manufactured to UL and CSA standards. Easy to install and easy to clean. Made in the USA.