Features: - This product is suitable for measuring the alcohol concentration of Range 0-80% v/v. - The product has sturdy design,compact in size and light in weight,convenient to keep up and carry arround. - Equipped with scale measurement which provides direct reading,and the exact testing results are guaranteed,can be used with confidence. - Place a few drops of the liquid on the optical part of the refractometer,cover the prism,look through the eyepiece against the light,and you will be able to read the result value on the scale. Specifications: Measuring range: 0-80% Package included: 1 x Handheld alcohol meter 1 x Screwdriver 1 x Dropper 1 x Wipe Cloth 1 x User Manual Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.