I wanted a small portable air compressor to inflate tires on my lawn equipment, car and bikes. I didn't think I would find anything of value. But I'm surprised. Not only does it meet all my needs, but it also works wirelessly. You charge it up and it can fill multiple tires with one charge. It also charges via a USB cable, so it can be charged from an outlet or even a computer (in a pinch). I have found that I can charge it in the car after use. It was very comfortable. It won't inflate your tire as quickly as a mains-powered compressor, but it's good enough for a battery-powered portable. Enjoy!