TST507 has saved me three times now. Had a tire with a leaky valve stem on brand new tires and it caught the slow leak so I could get it fixed before any time damage. Second and third times were nails in the tires one with a fast leak and one with a slow leak. Was on the road in Denver and the fast leak happened and I was able to pull over and change times before it hit 65 psi. I was running 80 psi in the trailer tires. Alerted us very quickly.
Saved me money from ruining a tire. Screen is very easy to read and it gives air pressure and tire temp.
Curly