Engineered specifically to quickly determine the alcohol content of wine, beer, juices, whisky, vodka and a variety of other liquors. RHW-80ATC works with distilled liquids such as wheat beer and red wine, but supplies the best results in distilled alcoholic solutions in all kinds of pure alcohol such as clear, grains and liquor grain. Measure the alcohol content accurately in seconds! All you need to do is manufacture a distillate of the liquids to be measured, and then place the distilled sample on the prism. It"s FULLY EQUIPPED with ATC(Automatic Temperature Compensation) that automatically adjust itself to correct temperature discrepancies during use. Capable of measuring with high accuracy and provides precise results. It"s equipped with vivid and sharp reticle chart for easy and comfortable reading. Specifications: Measuring Range: 0 - 80% Vol Minimum Division: 1% Accuracy: ±1% Reference Temperature: 20°C ATC(Automatic Temperature Compensation) Compensation Range: 10°C~30°C (50°F~86°F) Manual calibration with mini-screw driver provided Weight: 165g Package Included: 1x RHW-80ATC Portable Refractometer 1x Mini Screw Driver 1x Suction tube 1x Soft protective carrying case 1x English User Manual