Material: Metal + Plastic Measuring Range: 0-80%. minimum unit: 1% Accuracy: 1% reference temperature 20 C. Accessories: 1*meter 1*pipette, 1*cleaning cloth, 1*screwdriver Note: 1. Accurate measurement based on good calibration, please calibrate the refractometer before your first use. 2. Please keep the refractometer dry and clean to keep the instrument accurate and durable. NOTE: Not recommended for wine or others that are high in sugar and other ingredients. 1. EASY AND QUICK MEASUREMENT Alcohol refractometer for testing alcohol-alcohol volume percentage for brandy, whiskey, vodka, etc. NOTE: Not recommended for wine or any other product high in sugar and other ingredients. 2. Accurate Readings with ATC: Handheld alcohol refractometer with automatic temperature compensation (ATC), no need to worry about temperature change affecting reading accuracy. The alcohol by volume percentage refractometer takes into account changes in ambient temperature and automatically compensates for them accordingly to allow accurate and repeatable measurements. 3. Endless Use: It is a portable optical instrument for bartenders, liquor dealers and food manufacturers, etc. The scale range is 0 to 80% V/V (V/V - volume of alcohol in percent), division: 1% v/v. 4th Metal + Plastic: The alcohol refractometer is made of non-staining, non-corrosive and non-reactive aluminum, easy to carry, scratch resistant and durable. 5. NOTE: Not recommended for wine or anything high in sugar or other ingredients.