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Title: Great value and accuracy but not easily adjusted.
Review: For its ridiculously low price, it's plenty accurate. It tested within 1 percentage point right out of the box, but when I tried to calibrate it the little adjustment screw on its back proved very imprecise. With the slightest touch of a small screwdriver, the needle jumped too far too fast. Buy it and test it with a cheap calibration kit (like Boveda one-step calibration) but don't mess with the screw. Simply remember if it's one degree too high or too low and be glad you got it for a few lousy bucks!
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