Digital brix refractometer with 0-55percent range, 0.2percent accuracy and 0.1percent resolution. An innovative substitute for traditional birx meter to measure the sugar content. Automatic temperature compensation (10C to 40C) and high light-transmission prism for higher accuracy and consistance. Easy to use, do zero calibration for the first use. Then drop samples, close the cover and press start button, the brix value will be displayed on the screen. High definition digital brix meter with fast reading. The digital brix meter is equiped with 600mah built-in lithium battery. One full charge lasts at least one month. USB charge, eco-friendly and . The sample tank part is waterproof and can be washed under running water after use. Please keep the charging port away from water. The refractometer is a good assistant for , winemakers, food beverage producers, fruit growers and sellers. Attention!!! 1.Test water brix is 0.0percent before using(0.2percent accuracy),if not ,need zero clearing or calibration. 2.Sample quantity:1 or 2 of the depth of the sampling tank at least. 3.Cleaning measuring tank before measuring and calibration. Colour: Black Material: Plastic Package Contents: 1xDigital brix refractometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.