This is the second TPMS I have bought. The first was from another company and after 2 weeks I gave up setting it up. I wanted a TPMS for my van so I bought one, installed two sensors for my single axle trailer and then spent two hours reading the 12 page manual. I finally gave up, I think with a tire pressure gauge and an infrared thermometer I can monitor tire pressure and temperature more easily and accurately. The instructions are useless, the display freezes, and I'm an engineer and can read quality manuals. I don't even want to waste time calling the company as most other buyers say they can't be contacted.