Features: 3-in-1 design, multi-purposed refractometer for measuring Baume, Brix and alcohol level. Made out of aircraft aluminum, which is corrosion resistant and oxidation resistant. Equipped with anti-slip handle and high definition prism, convenient to use. ATC technology (Automatic Temperature Compensation) helps it to adjust to different temperature ranges without having to calibrate it each time, ensuring accurate readings. Widely used by home brewer, wine and cider makers. Notes: Clean your instrument after getting the readings for long-term health and accuracy of your refractometer. Specifications: Material: Aluminum Color: Black Measuring Range: Alcohol: 0-25%Vol Brix: 0-40%Brix; Baume:0-22Be' Minimum Division: 0.2%Vol; 0.2%Brix; 0.2Baume Accuracy: ±0.2%Vol; ±0.2%Brix Temperature Compensation Range(ATC): 10°C – 30°C Length : 170mm / 6.69in Package Weight: 250g / 8.81oz Package Size: 21 * 8 * 5.5cm / 8.26 * 3.14 * 2.16in Packing List: 1 * Refractometer 1 * Cloth 1 * Storage case 1 * Screw driver 1 * Pipette 1 * User Manual (English)