We bought this to use for home brewing, cider, mead, etc., but every time I measure any batch, of any liquid that should have an alcohol content it reads .99.  Mead, .99, cider .99, 40 proof rum .99.  I would look for another brand, I don't trust the thing~  It is packed well, I got a hydrometer tube to do accurate readings, I've waited 2 months and the batches never change, then I tried it with a known item, store bought rum with a tested and listed alcohol content, measured the same as everything else.  Disappointed