Measuring range: 0-90% BrixDivision increment: 0.5% BrixMaterial: AluminumA refractometer which is easier and more accurate than a hydrometer for measuring sugarsReference temperature: 20 CelsiusManual calibration with mini-screw driver includedPortable refractometer measures the Brix of your wort or winePackage Content:1 x Refractometer1 x blue small screwdriver1 x straw1 x English manual1 x carrying caseNote:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.