Product material: metal + plastic Measuring range: 0-80% Minimum unit: 1% Accuracy: 1% Reference temperature: 20C Accessories: 1 x measuring device, 1 x pipette, 1 x cleaning cloth, 1 x screwdriver Note: 1. Accurate measurement depends on proper calibration. Please calibrate the refractometer before first use. 2. Keep the refractometer dry and clean to ensure accuracy and longevity. 3. Not recommended for wine or liquids high in sugar and other ingredients. 1. Easy and fast measurement: Alcohol refractometer for testing alcohol volume percentage in brandy, whiskey, vodka, and similar spirits. 2. Accurate readings with ATC: Handheld alcohol refractometer features automatic temperature compensation (ATC), eliminating errors caused by temperature variations. Automatically adjusts for ambient temperature changes to deliver reliable and consistent results. 3. Wide application: Portable optical instrument ideal for bartenders, alcohol distributors, and food manufacturers. Scale range: 080% V/V (alcohol by volume), division: 1% V/V. 4. Durable construction: Made of non-staining, non-corrosive aluminum and plastic. Lightweight, scratch-resistant, and built for long-term use. 5. Not suitable for wine or substances with high sugar content or additional ingredients.