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the pressure gauge is very precise and back unlimited, but on arrival it had a low battery, a cr 2032 that I had to buy. The inflation system is well functioning but maybe not suitable for fat tires of my bike because they contain a lot of volume of air; I took a lot of time to portals from 0.8bar to 1.5 bar. I think it might be more suitable for standard prenumatals with less air volume.