I am concerned about the quality of this product, I received it and used it after charging, it's great for bikes and balloons , it's a bit slow for car tires. When I was working on my 3rd tire (just adjusted the PSI from 27 to 32 without fully filling it up). It will overheat after a few minutes of continuous use, causing internal parts to melt and air escaping through the inflation valve. I returned it the next day.