I just received the Air Dragon today, and was very excited to use it, knowing that my tires were low. It was very easy to use and hook up to the tire, I set the dragon for 35 PSI limit. The dragon was giving me an incorrect reading it would display 30, the, to 31 then drop to 29.it was a little confusing, especially when the sensor display said 34. thankfully I had my in dash tire sensor to tell me the correct tire pressure. All good!