I've been using it for over a year. I climbed into the application to buy something - this old order of mine got out, and I sprinkled a review. Nice gauge! I work in the service because he does not have to be bored. The battery is still alive. It takes readings accurately, including ALUM rotation. It is convenient to use. There are calibration plates on which you can calibrate for prophylaxis. until needed. But you can check others. Completely satisfied. Thanks to the manufacturer. I recommend. If I crush it somewhere, I'll buy the same one.