The mid-sized Koolatron Voyager cooler uses state-of-the art thermoelectric cooling technology. It features a durable brushless motor for internal air circulation and even temperature distribution. This cooler can be used horizontally like a chest or in a vertical position, like a fridge. Before you head out on the open road, pack your Koolatron cooler with pre-chilled food and drinks. This will ensure your snacks and ice cold. Cooling warm or hot items can take several hours. When packing your vehicle, ensure nothing is blocking the fan on your Koolatron travel cooler. This 12 volt cooler requires unobstructed air flow around the fan in order to ensure even air circulation and optimal cooling.