Easy to use and easy to read. A must-have. This hydrometer reads accurately at 60 Degrees Fahrenheit. Any temperature above or below 60F requires that you add or subtract from your reading. This deluxe hydrometer for beer or wine has a built-in thermometer and correction scale that shows the temp adjustment right on the hydrometer. The deluxe hydrometer features three scales - specific gravity, potential alcohol and Brix (Balling). 12.75" long. Current range is .990 to 1.160