This Alcohol & Brix Refractometer is primarily for winemaking. It test the sugar content (range up to 40% Brix) and alcohol concentration by volume (range up to 25%Vol) in grapes. With a few drops of grape juice on the testing prism, you will be able to know the brix and predicted alcohol level. With RETK-80 you can:* measure the percentage Brix of grapes or other fresh fruit* determine the progress of crop ripening* measure the sweetness of grape juice. Used to classify grapes* predict the alcohol content of the wine by measuring the sweetness of the grape juice* measure the amount of sugar present as well as alcohol concentration in grapes* allow the winemaker to determine when a fruit is at its peak of ripeness and should be harvested COMMON FEATURES ON OUR REFRACTOMETERS: Auto Temperature Compensation (ATC), increase accuracy and eliminates concerns on temperature Easy to calibrate and use Soft rubber eyepiece for comfortable viewing Cushioned with soft and comfortable non-slip rubberized grip, insulate test solution from body heat Adjustable focus, clearly defined scale, w/ large easy-to-read measurements Durable, built to last long Approved by strict quality and safety standards Accurate results guaranteed Features: Working temperature: at 20°C (about from 18°C to 25°C) Measuring Range: Alcohol: 0-25%VOL / Brix: 0-40%Brix Heavy duty (Durable Aluminum) LIGHTWEIGHT, made with the highest and finest quality of ALUMINUM & rubber Features automatic temperature compensation (ATC) and comes with Portable USB LED Ligh Specifications: Measuring Range: 0-25%Vol 0-40%Brix Minimum Division: 0.2%Vol 0.2%Brix Accuracy: ±0.2%Vol ±0.2%Brix Reference Temperature: 20°C ATC :10~30°C Length : 16.2cm Weight: 96 g Shipping weight: 0.32kg Shipping size: 21 x 9 x 6 cm Set Includes: 1 x Alcohol & Brix Refractometer 1 x English Instruction manual 1 x Mini screwdriver 2 x Pipettes 1 x Cleaning Cloth 1 x Portable USB LED Light (Power Bank is not included in the set) 1 x Protective Carrying Case