ABOUT THIS PRODUCT: This thermometric cooler / warmer is an Eco-friendly, “green” product, cooling and warming using advanced semiconductors that are free of CFC's and refrigerants. Enjoy the many benefits of the cooler / warmer, while protecting the safety of the environment. The cooler and warmer is insulated, ensuring that your food and beverages stay cold or warm, making this product great for use in a car, boat, RV, or any other mode of transport.