Product material: metal + plastic. Measuring range: 0-80%. Minimum unit: 1%. Accuracy: 1%. Reference temperature 20 C. Accessories: 1 * measuring device, 1 * pipette, 1 * cleaning cloth, 1 * screwdriver. Note: 1. Accurate measurement is based on good calibration, calibrate the refractometer before first use. 2. Keep the refractometer dry and clean for the instrument to be accurate and durable. NOTE: Not recommended for wine or other products that contain a lot of sugar and other ingredients. 1. EASY AND QUICK MEASUREMENT Alcohol refractometer to test alcohol volume percentage for brandy, whiskey, vodka, etc. NOTE: Not recommended for wine or any other product that contains a lot of sugar and other ingredients. 2. ACCURATE READINGS WITH ATC: Handheld alcohol refractometer with automatic temperature compensation (ATC), you no longer have to worry about temperature changes affecting reading accuracy. The refractometer for measuring alcohol volume percentage takes into account changes in ambient temperature and automatically compensates for them to enable accurate and repeatable measurements. 3. Infinite use: It is a portable optical instrument for bartenders, alcohol sellers and food manufacturers, etc. The scale range is 0 - 80% V/V (V/V - alcohol volume in percent), division: 1% v/v. 4. Metal + Plastic: The alcohol refractometer is made of non-staining, non-corrosive and non-reactive aluminum, which is easy to carry, scratch-resistant and durable. 5. NOTE: Not recommended for wine or anything with high sugar content or other ingredients.