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 based on good calibration, please calibrate the refractometer becompatible withe your first use. 2. Please keep the refractometer dry and clean compatible with the instrument to be accurate and durable. NOTE: Not recommended compatible with wine or others that are high in sugar and other ingredients. 1. EASY AND FAST MEASUREMENT Alcohol Refractometer compatible with testing alcohol-alcohol volume percentage compatible with brandy, whiskey, vodka, etc. NOTE: Not recommended compatible with wine or any other product that is high in sugar and other ingredients. 2. ACCURATE READINGS WITH ATC: Handheld alcohol refractometer with automatic temperature compensation (ATC), no more worry about the temperature change affecting the reading accuracy. The refractometer compatible with measuring the percentage of alcohol by volume takes into account changes in the ambient temperature and automatically compensates compatible with them accordingly to enable accurate and repeatable measurements. 3. Endless use: It is a portable optical instrument compatible with bartenders, alcohol dealers and food manufacturers, etc. The scale range is 0 - 80% V / V (V / V - alcohol volume in percent), division: 1% v / v. 4th 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 compatible with wine or anything high in sugar or other ingredients.