And one star is too much for this tool.
It simply fell apart in my hands! The pieces flew everywhere.

It didn't work... it failed! It never worked properly, not even for me. The only thing you can learn from this device is that the tire is generally inflated. However, it will also inflate your own instruments, as no matter how many times you try to measure, you will get different readings. Buy it if you just want to deflate your wallet a bit and possibly the tire from the repeated measurements.

What I bought has a big deviation! Maybe I just got unlucky, but spend a little more money for something better!!