Features Brewing Tester: Designed to have a wide measurement range of 0-80%, the refractometer can test your brewing to better improve your wine making. Accurate Works: Built in automatic temperature compensation and 1% accuracy enable consistent and accurate readings on the beer and liquor. Practical Uses: Can be widely applied to household brewing, agriculture, horticulture, educational utilization and so on, useful and reliable. Easy Operation: Simple in both operation and calibration, the brewing refractometer ensures high working efficiency to meet your various needs. Simple Carrying: Comes with a light weight and a compact size as well, the refractometer can be easily carried for indoor and outdoor using. Specification: Item Type: Brewing Refractometer Material: Aluminum Alloy Measuring Range: 0-80% Grid Value: 1% Accuracy: ± 1% Scope of Application: For the concentration measurement of liquor and ethanol.  Package List:1 x Brewing Refractometer 1 x Dropper1 x Screwdriver1 x Soft Cloth (Random Color)1 x User Manual1 x Storage Box Note:1. Be careful and use in strict accordance with the instructions. Do not loosen the connecting parts of the instrument at will. Do not drop, collide, or vibrate violently.2. After use, it is strictly forbidden to put it directly into water for cleaning. It should be wiped with clean soft cloth. The optical surface should not be bruised or scratched.3. The instrument shall be stored in a dry place without corrosive gas.4. Avoid loss of spare parts. Package List 1 x Brewing Refractometer 1 x Dropper 1 x Screwdriver 1 x Soft Cloth (Random Color) 1 x User Manual 1 x Storage Box