31L capacity offers plenty of room to store food and drinks for an overnight trip or a beach day with the family Uses solid state thermoelectric technology to keep your food and drinks cold without the need for ice Plugs directly into a 12V DC power supply from your car's cigarette lighter to deliver the cooling power of a block of ice Can cool contents to rougly 20 degrees Celsius below ambient temperature, and warm food up to 55 degrees Celsius Designed with heavy-duty wheels and a convenient handle so you can wheel the cooler around easily; no heavy lifting required Can be switched from horizontal chest to vertical fridge position to suit your needs