Product Description. Material: metal + plastic Measuring range: 0-80% Accuracy: 1 % Reference temperature 20C 1 * Measuring device 1 * Pipette, 1 * Cleaning cloth, 1 * Screwdriver Note: 1. Accurate measurement is based on good calibration, please calibrate the refractometer before first use. 2. Please keep the refractometer dry and clean to ensure the accuracy and durability of the instrument. Note: Not recommended for wine or other ingredients with high sugar content. 1. Convenient and quick measuring alcohol refractometer for testing alcohol by volume percentage of brandy, whisky, vodka, etc. Note: Not recommended for wine or other products with high sugar or other ingredients. 2. Automatic Temperature Compensation (ATC): Handheld alcohol refractometer with automatic temperature compensation (ATC), no need to worry about temperature changes affecting the accuracy of the readings. Refractometers used to measure alcohol by volume take into account changes in ambient temperature and automatically compensate accordingly to ensure the accuracy and repeatability of measurements. 3. Wide range of uses: This is a portable optical instrument for bartenders, alcohol distributors, food manufacturers, etc. 4. METAL + PLASTIC: The alcohol refractometer is made of non-polluting, non-corrosive and non-reactive aluminium, which is easy to carry, scratch-resistant and wear-resistant. 5. NOTE: Not recommended for wine or anything high in sugar or other ingredients.