Product descriptionMaterial: metal + plasticMeasuring range: 0-80%. Minimum unit: 1% Accuracy: 1% The reference temperature is 20C. Accessories: 1 measuring device, 1 pipette, 1 cleaning cloth, 1 * Screwdriver Notes: 1. Accurate measurement relies on good calibration, please calibrate the refractometer before first use.2. Please keep the refractometer dry and clean to make the instrument accurate and durable.Note: Not recommended for wine or other products with high sugar content and other ingredients.1. Simple and quick measuring alcohol refractometer for testing the alcohol volume percentage of brandy, whiskey, vodka, etc. Note: Not recommended for wine or other products high in sugar and other ingredients.2. Accurate ATC Measurement: Portable alcohol refractometer with automatic temperature compensation (ATC), you don't have to worry about temperature changes affecting measurement accuracy. Refractometers used to measure alcohol volume percentage take into account changes in ambient temperature and automatically compensate accordingly for accurate, repeatable measurements.3. Unlimited Uses: It is a portable optical instrument for bartenders, wine merchants, food manufacturers, etc. The scale range is 0-80% v/v (alcohol volume percentage v/v), division: 1% v/five metal + plastic. : The alcohol refractometer is made of non-staining, non-corrosive and non-reactive aluminum, easy to wear, scratch-resistant and durable.5. Note: Not recommended for wine or foods high in sugar or other ingredients.