According to the manual, it’s 9. It's really portable and convenient to have. I just wish the screen displayed the PSI visibly. I have a Tesla, and this little device works like a charm! I just tried it for the first time after purchasing.

For the price, you can’t beat it!

The device inflated the tires effectively.

These lever inflators tend to break over time, but so far, this one is working well.

I loved it! With metal components, it should have a longer lifespan. Although the plastic feels a bit flimsy and might break if dropped, it performs well for filling full-size car and truck tires, even though it can take some time and gets a bit hot.