Perfectly inflates tires. Terrible for close reading. Set 35 psi front and 40 rear for auto shut off when psi is set. When my tpms system read the new readings, it was well above what it should have been. As a result, it turned out that 44 was ass before 47. On top of that it happened when I was on my way to work and it was a cold morning so I expected it to be accurate but luckily I went early and had time to take the pressure off but definitely learned my lesson . Don't trust the testimony of the psi. Also, it's definitely bloated, but doesn't cost close to $40 due to inaccuracies.