Fantastic price for these full size regulators. The quality is abysmal at best. Feeling of cheap plastic in the outside waiting area. I checked the tire pressure and the little reader fired. My kids keep losing these things so they are perfect for my family. When it comes to tire pressure, consistency is key. Use the SAME stick IN THE MORNING before your ride on the same tires. Inflate to recommended pressure. You should be fine. A bonus gift of a bag of hats is included for those who lose them. Thoughtful. Compared to a better quality pressure tester, these cheap models were within three psi. Time will tell how long they last. For now, inflated tires are happy tires.