This is a cheap product that I would avoid if possible. The first caliper I received didn't work at all. I would adjust the caliper and the measurements would be way off. If I moved it 1 cm, the caliper read about 97 cm, even if I set its value to "zero". Revain was kind enough to accept the return and send me a second one. The second came with a broken box (possibly the result of careless handling during shipping) and I couldn't turn the caliper off. To make matters worse I can't change the battery as the screws were over tightened and I ripped off the supplied screwdriver trying to open it. Now I just have to wait for the battery to die before it breaks, so I'm just cutting my losses. Overall, I advise against buying this cheap product. Invest a little more in a more reliable brand.
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