From the product description, check product page for current description, price and availability:

• 1.Dual Scale Testing Brix 0-40%/ Alcohol Degree of Wine,you can get the reading easily just with 2 drops to know your readings.With this grape refractometer, you can pick out ideal grapes for making wine easier and quicker.
• 2. WIDE APPLICATION WITH 0-40% BRIX SCALE:This refractometer is designed for grape wine brewing,but with extra large scale range of brix 0-40% lends itself to many other uses too. You can use it to test the brix of any sample liquid.
• 3. ACCURATE READINGS WITH ATC:Handheld wine Refractometer with Automatic Temperature Compensation(ATC),no more worry about the temperature change will influence the reading accuracy.the refractometer will account for changes in ambient temperature and automatically compensate accordingly to provides accurate and repeatable measurements
• 4. AIRCRAFT ALUMIUM BODY MATERIAL:The grape wine refractometer is made of non-staining, non-corrosive and non-reactive aluminum which is lightweight to carry,anti-scratch and durable.
• 5. This Unit is better than the 0-32% Brix Models. Because brewing high quality wines need more than 32% sugar content Brix. Excellent winemakers prefer to use nearly 40% Brix grapes to make wine.