Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not so accurate

I have 2 accutire ms-4350b.They are consistent but inaccurate.They were both zeroed, and one read 44.0 and the other read 53.5 on the same tire. This was repeatable.Also they will not work if cold at all.About 50 degrees F is required for them to start up.