This is such a handy tool! It's hard to find gas stations that offer free air. Since our tires need some air now, we can simply inflate them at home. We also got this tire inflator for RVs. We can check the tires on our vans and tractors and inflate them if necessary. The digital display makes it very easy to keep track of how much air is in each tire. This Ryobi tire inflator usually comes by itself and you need to buy the battery and charger separately. It's so great that this set has everything you need! It even comes with a carrying case to keep all the pieces together, which is super handy when you're on the go! I'm glad I found this handy tool! Love it!