1>We always have enough products in stock. 2>We send all the parcels by registered Airmail with valid tracking number. 3>For big order, please contact us before making an order. We'll provide you big discount. 4>We provide Manual in English, French, German, Spanish, Italian, Japanese, Ruian. This Alcohol refractometer is designed for the measurement of distilled beverages (ethanol with water) like whiskey, brandy, fruit brandy, slivovitz, vodka, gin, tequila, Chinese alcohol, etc. It has a scale in the range of 0 - 80 % (VOL - alcohol volume percent). Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry arround. We provide Manual in English, French, German, Spanish, Italian, Japanese, Ruian. One Cloth bag for the convenient of customer is provided. With Built-in ATC (Automatic Temperature Compensation) from 10~30 degree Celsius. Soft Rubber eyepiece for comfortable viewing Equipped with scale measurement which provides direct reading Accurate testing results guaranteed Durable and bulit to last long Adjustable manual focusing Use ambient light only which means battery or power source is not required Easy and very convenient to use. Place a few drops of the liquid on the optical part of the refractometer, cover the prism (the liquid will spread more easily over the prism), look through the eyepiece against the light (focus, if neceary) and you will be able to read the result value on the scale. Measuring Range 0-80% v/v(VOL - alcohol volume percent). Widely used for scientific research, food producing, alcohol retailer, etc. Easy to focus & calibrate and very convenient to use. Measuring Range: 0~80%V/V Resolution: 1% Reference temperature 20C Automatic Temperature Compensation (ATC: 10~30C) Focus poibility Item Weight: 87g (3.07oz) Length: 160mm (6.30 inches) 1 x Refractometer 1 x Plastic pipette 1 x Mini Screw Driver 1 x Cleaning Cloth 1 x Plastic Box OR White Box OR Bubble package (as your choice) 1 x Manual in English, French, German, Spanish, Italian, Japanese, Ruian