Product Description Material: Metal + Plastic Measurement Range: 0-80%. Minimum Unit: 1% Accuracy: 1% Reference temperature 20C Accessories: 1 * measuring instrument, 1 * pipette, 1 * cleaning cloth, 1 * screwdriver< /p> Note: 1. Accurate measurement based on good calibration, please calibrate the refractometer before your first use. 2. please keep the refractometer dry and clean, which can make the instrument accurate and durable. NOTE: Not recommend for wine or others which contain a lot of sugar and other ingredients.< /p> 1. EASY AND QUICK MEASUREMENTAlcohol refractometer designed to test the volume percentage of spirit alcohol, for brandy, whiskey, vodka, etc. NOTE: Not recommended for wine or others containing lots of sugar and other ingredients. 2. ACCURATE READINGS WITH ATC: Handheld alcohol refractometer with automatic temperature compensation (ATC), no longer worrying about the temperature change will influence the accuracy of the reading. ambient temperature changes and will automatically compensate accordingly to provide accurate and repeatable measurements. 3. Endless Application: It is a portable optical instrument for bartender, liquor retailer and food production etc. v. 4. Metal+Plastic: The alcohol refractometer is made of non-staining, non-corrosive and non-reactive aluminum material, light to carry, anti-scratch and durable. 5. NOTE: Do not recommend for wine or others that contain a lot of sugar and other ingredients.