1. Accurate measurement: Three spirometers make the determination of alcohol content more precise and easier than with a standard measuring device. Measuring range: 0-40 vol%, 40-70 vol%, 70-100 vol%. Minimum scale: 1 vol%. 2. One thermometer (0-50°C) included with a temperature correction chart. The recommended application temperature is 20°C; if the sample temperature differs, measure it and use the chart to adjust the reading. 3. Easy alcohol content calculation (ABV). Graduated scales clearly indicate alcohol by volume, and the clear markings are easy to read. 4. Simple to use: Similar in function to a brewing hydrometer but designed for spirit alcohol measurement. To use, pour a sample of the liquid into a tall glass or high chemical-resistant plastic cylinder, allowing enough space for the alcohol meter to float freely. 5. Measures alcohol range: 0-40 vol%, 40-70 vol%, 70-100 vol%, with a minimum scale of 1 vol% at 20°C. Package includes one 0-50°C thermometer.