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 before your first use. 2. Please keep the refractometer dry and clean for the instrument to be accurate and durable. NOTE: Not recommended for wine or others that are 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 for measuring the percentage of alcohol by volume takes into account changes in the ambient temperature and automatically compensates for them accordingly to enable accurate and repeatable measurements. 3. Endless use: It is a portable optical instrument for 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 for wine or anything high in sugar or other ingredients. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it