Reliable iceless cooling technology provides the ultimate in convenience:Truckers, campers, tailgaters, or anyone heading out on a long road trip will love the practicality of iceless thermoelectric cooling that uses less power than your vehicle’s tail light. With a huge 42L capacity and a specialized domed lid, the Koolatron® Travel Saver has room for everything you need for the long haul. Add an AC adapter (sold separately) to seamlessly transfer the cooling power from your vehicle to the indoors for the ultimate in travel convenience.Convenient access to your snacks and drinks on the go:Efficient and eco-friendly thermoelectric technology with no CFCs makes this the perfect travel accessory for your car, boat, or RV, effectively keeping items cool to 40°F (22°C) below room temperature or warm to 140°F (60°C). With its versatile design, you can use the Travel Saver as a classic ice chest or upright as a convenient mini fridge with room for up to 72 standard cans. The durable hard plastic injection molded exterior protects your contents and ensures peak performance.Tips for Best Use:For quickest cooling, pre-chill items before placing in cooler.For effective operation, ensure fan is not blocked.Minimize opening and closing and ensure lid is closed properly.Lowest possible temperature depends on the surrounding temperature.To avoid draining your vehicle’s battery when using 12V mode, only run cooler when the engine is on.