Weighing only 5.6 ounces the Targus Universal Auto/Air Notebook Adapter is the only solution needed for mobile users constantly on the go. Our patented PowerTip technology automatically controls the voltage to match your notebook requirements. This advanced power source is dual purpose - it not only allows you to plug virtually any notebook into most airline seats with inflight power capability, it also works in all vehicles with a standard cigarette lighter. It is the safest, most convenient way to power and recharge your notebook. PowerTips included in this item are 19, 21, 24, 26, 38, 58, and 74, supporting most Apple, Dell, Gateway, Compaq, and Sony notebooks as well as other brands.