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Title: Excellent - No O-ring problems
Review: Intuitive controls - at the most basic level just press the gauge against the valve stem, wait for the beep and read the digits (displayed for 10 secs).With my particular device, I had no problems with O-rings mentioned in several other reviews. Used this product first day on three vehicles from a Prius to a Ford 4x4. Interestingly, my engineering friend *did* have leakage problems but this was because he was applying the gauge at all "square" to the tire. Once he remembered to line it up, we were all fine. The seal is not fussy, with a good 10-degree forgiveness off plumb.Under- or over-inflation can really accelerate the death of a tire, and this gauge makes it a little easier to monitor.
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