Portable Mini Car Tire Air Compressor 250PSI 12Volt with Pressure Checking Gauge Robust and Durable Design. Electric Cord Plugs Into 12 Volt Cigarette Lighter. Light-weight & Compact Design. Equipped with pressure checking gauge that reads in lb/in2, kg/cm2 and bar. This inflator has a pressure gauge that reads in lb/in and kg/cm bar. Sporting enthusiasts, drivers, campers, and bike riders can find an almost unlimited amount of use for a mini air compressor. Do not pump over 10 minutes continuously break 30 minutes in every 10 minutes pumping to better protect the life of motor. Package contents: 1 x 12V Tire Air Compressor, 1 x Sports Needle, 2 x Nozzle Adapter Powered by your car cigarette lighter Easy to use - just plug into your car cigarette lighter for power, slip universal adapter. Over tire valve and you are ready to inflate They can inflate bike tires, inflatable boats, or even car tires if you have a flat while driving. Because they can be powered through a cigarette lighter in your vehicle, they are incredibly versatile and a lifesaver in some instances