I didn't need to see accuracy, I needed to see changes while driving. I knew what I would get with the cheap Chinese junk. Set tire pressure alerts to 10psi above and below actual desired pressure. You will still receive a warning before the tire goes flat. Set the temperature warning as high as possible (99F). I would turn it off if I could. The pressure display deviates by 3+/- from the actual pressure. The temperature readings show the same 3 +/- the actual temperature when parked in the shade, but change everywhere while driving.