Life in the city of Chicago can be difficult when you're trying to get some air at the gas station. Either he is not working or he is busy. This portable pump makes it easy for me to inflate my tires and the best part is that I can plug it into a car outlet to power it. Interchangeable for other things like basketball, soccer, not what I was looking for, but I don't have to worry if I have to. Great for the price and it can save a life for its safety.