It does the job, kinda.
Got to use this gauge this weekend. I bought it to use on track, I drag race & check pressure before every pass. It isn't the best one I have. It has an odd action (slowly rises about 50% of the pressure, then jumps to the pressure it wants to read) and the chuck hurts when you press on it because it has the little pin on the back you can use to let air out if needed. The pressure release button only works on the gauge, it doesn't release pressure in a controlled way to lower tire pressure, it's just there to maintain whatever the last gauge reading was. I had to release air with the chuck. But yes, it does work as a tire pressure gauge. As long as you're okay with it's other flaws.