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 is based 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 use with 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 due to temperature fluctuations. 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), with 1% V/V divisions. 4. Durable construction: Made of non-staining, non-corrosive aluminum and plastic. Lightweight, scratch-resistant, and built for long-term use. 5. Not recommended for wine or substances high in sugar or additional ingredients.