I have the TST 507 and I’m very happy with it. While on a trip this summer I had a high tire temperature alarm go off. It said the outside real dual was 207 degrees, I knew that couldn’t be right so I pulled over and checked the tire and it was cool as could be. When we stopped for the night I sent an e mail to TST, it literally was less then 1 minute after I hit send my phone rang. It was TST and he walked me through reprogramming the sensor. It fixed it and haven’t had a problem since. Can’t beat that kind of customer service, he even apologized for any inconvenience it caused.
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