1.Handheld refractometer, used to measure the Brix specific gravity of your Wort in solution, the Brix scale range is 0-32%, and the specific gravity scale range is 1.000-1.120 2.Easy to use, place 2-3 drops of sample on the main prism, close the plate and look through the eyepiece for brix reading 3.Versatile refractometer with automatic temperature compensation (10~30), calibration screw (Calibrate to "0") ensures accurate measurement and focus adjustment ensures clear reading 4.Portable Refractometer, sturdy design, compact in size and light in weight, lined with plastic case, convenient to keep and carry 5.It is widely used in beer industry to track fermentation process, & commonly used by home brewers