I compared this Unisiesone gauge to another similar digital gauge and they both showed the exact same psi which was good to know. I did that several times to be sure. This model has a battery indicator on the side and is big enough to be seen. The construction took a little while. I wanted to check the pressure for leaks. I found the screw in the valve to turn on the air chuck a terrible problem, trying to align it with the Schrader tire's valve threads without letting air escape from the tire before the threads are finally locked tight. I've tried other Schrader tire valve stems, thinking this one might have stripped threads, but they gave the same results. As it turned out, using a "pivoting air liner" along with the included chrome "90 degree valve stem extension" worked with no leaks. Make sure the tire chuck is very tight before releasing the tire chuck spring lock to prevent the Schrader valve stem from escaping air. After a little practice it finally worked. Overall I find the inflator gauge accurate but the accessories are not of the highest quality.
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