Similar in use to a brewing hydrometer, but measures in a different range (0-50% alcohol). The use of an alcoholmeter is very straightforward. Pour a sample of the spirit to be tested into a tall glass or high chemical tolerant plastic cylinder, leaving enough space for the alcoholmeter to disperse the liquid. In order to obtain the most accurate reading possible, try to ensure that the liquid is as close to 68F (20C) as possible, as this is the temperature that the alcoholmeter has been calibrated to. If your alcoholmeter is calibrated to a different temperature, which should be stated on the meter, ensure that your liquid is at the quoted temperature. Place your alcoholmeter in the sample and spin it gently to dislodge any bubbles that may have been trapped, as these could cause the alcoholmeter to float slightly higher and result in a low reading. Read the mark where the liquid level crosses the stem of the alcoholmeter. This is your percentage alcohol by volume. Specifications: Measure Range: 0-50% Color: Clear Quantity: 2 Pieces Note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before purchasing. Due to differences between monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Alcoholmeter 1 x 100ml Measuring Bottle