Good gauge for the price. I have had several of these pencils and they can be related anywhere. but hey, they're cheap. I checked it on a digital readout and it was accurate. My only issue is that the psi numbers on the readings are pretty close, although this pencil gauge isn't alone in this regard. If you want to come within 1psi, buy digital. If not, it's fine and the batteries never run out. leave in the glove compartment.