智能TPMS

First problem - The instructions are TERRIBLE. Second problem - I could not get the monitors to pair. I could pair 2 or 3 of the four but one or two would never pair. I finally got all 4 to work after about 5 attempts. Third problem - When pairing and with the speaker icon enabled, the app continuously speaks, "Thank you for using text to sp..." and then cuts off and repeats. Then, it says, "Your license has expi." and then repeats that over and over. You can mute by clicking on the speaker icon, but obviously the app has a bad library or something. Fourth problem - The minimum threshold is 14.5 pounds for alerts. I wanted to use this on my side-by-side and use tire pressures typically from 12 to 18 pounds. Fifth (and biggest) problem - Unbelievable inconsistency. All installed correctly on tires checked at 16.5 pounds with a manual gauge. Pressures show from 8.2, 14.9 and 16.4 (the fourth one did start working at one temporary point and said 16.9). Air temp was 37 degrees Fahrenheit and the tires (on a vehicle sitting for 8 hours) showed 27.3, 39.0 and 32.7.