DUAL SCALE: and precisely display the Brix 0-32% and Specific Gravity 1.000-1.120 at the same time, no need to switch unit for readings each time!ATC FUNCTION: The build-in Automatic Temperature Compensation feature makes it get consistently accurate reading, no need to control the liquids temperature deliberately, just make sure it's at roomtemperature during 0-25 .SAFE AND DURABLE: This refractometer is constructed with non-staining, non- and non-reactive High-quality materials which make sure and safety for all users.EASY TO USE: Just take a few of your liquids on the prism and hold the refractometer to the light, then look through the eyepiece, you can get the reading. No need lookup table and no waste!Material: plasticcolour: blackPackage Contents:1 x Refractometer