Dual Scale: Quickly and accurately displays Brix (0-32%) and Specific Gravity (1.000-1.130) at the same time, no need to change unit for readings each time Precise reading with ATC: Hand Brewing Refractometer with Automatic Temperature Compensation (ATC), the Brix Refractometer will understand changes in ambient temperature and automatically compensates accordingly to provide accurate, repeatable measurements on an easy to read scale. Easy to use: just take a drop or 2 of your brew on the prism and hold the refractometer up to the light, then look through the eyepiece to get the reading. No need for a lookup table and no waste Universal fit: ideal for home brewing, wine making, farming, gardening and educational purposes. Tester portable sugar container: easy to use, sturdy design, compact and lightweight, convenient to keep and carry