Review on 🚗 JACO ElitePro Tire Pressure Gauge - 60 PSI" - "JACO ElitePro 60 PSI Tire Pressure Gauge by Dwayne Quarles

I bought four (4) Jaco tire pressure gauges in total, assuming all four would show the same air pressure I was very wrong. Four pressure gauges in the tires and only one pressure gauge with PSI accuracy. Does anyone need to calibrate tire pressure sensors or similar better? I'm disappointed in two things, why is it listed as calibrated?; and how could all four (4) gauges show different tire pressures?