Considering the price this is a 5 star product. Somehow it's a little shorter. I like the accuracy of the product. It is accurate and reproducible to about 0.1 degrees. When it is perfectly horizontal or vertical, it emits a small beep. Some of the flaws and limitations that prevented a five-star rating: The digital display often turns off in the middle of a measurement. The display is unreadable when the product needs to be used vertically or upside down. There is no "off-vertical" measurement - readings are based on horizontal values. It's not that hard to subtract a value from 90 degrees, but the effort slows things down and introduces errors. There is also no way to find the difference between A and B. Again, you need to subtract the first reading from the second. Despite some limitations, this level is a valuable addition to my carpentry tools.
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