I thought I had reviewed this item before but can't find it. In any case, I was glad to get such a sensor. I used it relatively quickly after receiving it. As with most complaints, the tire's valve lock did not stay on, but only partially pressed against the valve stem, releasing air and reducing pressure. This only worked if you held down the plug on the valve. It worked when you did it. However, it accurately reads the tire pressure when inflating, or just checks the pressure. Fast forward to