Product descriptionMaterial: metal + plasticMeasuring range: 0-80%.Minimum unit: 1%Accuracy: 1%Reference temperature 20CAccessories: 1 measuring instrument, 1 pipette, 1 cleaning cloth, 1 screwdriverNote:1. Accurate measurement based on good calibration, please calibrate the refractometer before your first use.2. Please keep the refractometer dry and clean, which can make the instrument accurate and durable.NOTE: Not recommended for wine or others which contain a lot of sugar and other ingredients.1. Easy and quick measuring alcohol refractometer designed to test spirits alcohol volume percentage, for brandy, whiskey, vodka, etc. NOTE: Not recommended for wine or others containing a lot of sugar and other ingredients.2. Accurate Readings with ATC: Portable alcohol refractometer with automatic temperature compensation (ATC), no longer need to worry about temperature change which will influence the reading accuracy. The Alcohol Volume Percentage Measuring Refractometer will account for changes in ambient temperature and automatically compensate accordingly to provide accurate and repeatable measurements.3. Endless Application: This is a portable optical instrument for bartender, liquor retailer and food production etc. The scale range is 0-80% V/V (V/V - alcohol volume percentage), division: 1% v/v.4. Metal + plastic: The alcohol refractometer is made of non-staining, non-corrosive and non-reactive aluminum, light to carry, anti-scratch and durable.5. NOTE: Not recommended for wine or other products containing a lot of sugar and other ingredients.