1.EASY TO USE: This brix refractometer is easy to use, after calibration, put 2-3 drops of sample on the prism, and towards the light, quickly get the accurate readings through the eyepiece. 2.DUAL SCALES: The refractometer with brix scale and specific gravity scale, measuring range 0 - 32% (0.2%) brix and 1.000 - 1.130 (0.001sg) specific gravity for unfermented wort. 3.BEST REPLACEMENT: Accurate beer brix refractometer requires less sample solution for home brewing, home brewing, beer wort making and educational purposes, perfect to replace your old hydrometer or complicated operation hydrometer . 4.AUTOMATIC TEMPERATURE COMPENSATION: Beer Wort Refractometer With ATC function can automatically compensate according to ambient temperature changes, easier and faster to get readings and take control of beer brewing process. 5.ALUMINUM BODY MATERIAL: The refractometer is made of aluminum and ABS rubber, undyed, abrasion resistant and anti-corrosion. Lightweight and portable refractometer easy to carry.