(HY120) Used for both wine and beer. Allows you to keep track of your fermentation`s progress and determine the finished product`s alcohol content by taking readings before and after fermentation and comparing them. Also, allows you to verify when your batch is ready to bottle. This hydrometer features a Sugar Scale that indicates how much sugar is in the liquid in ounces per gallon. Handy for making beginning sugar adjustments. Tells you how much sugar to add to get from point A to point B. Also, has a Specific Gravity scale from .990 to 1.170 and a Potential Alcohol scale -2 to +22%. Comes with complete instructions.