I purchased two of these inflators, and I was so impressed that I ordered two more. Now, they are permanently located in each of the family vehicles, and nobody leaves home without them. Whether its topping off the bike tires, the lawn mower, or the car spare tire, they are used on a regular basis. The price made them a \"duh\" purchase, and I'm just sorry I didn't find them sooner. I had purchased a different inflator, which plugs into the cigarette lighter, but this one is so much handier, and that it is also a power bank makes it so much better. A spectacular buy at $19 each...delivered.