Product Description Specification: Wort SG: 1.000~1.120, accuracy +/-0.002Bx: 0~32% ATC range: -10~30C (50~86 F) Dimension: 172x40x40mm Package included:1 x Beer Refractometer1 x Calibration screwdver1 x Pipette1 x cleaning cloth1 x Instruction manual 1.EASY TO OPERATE: This bx refractometer is easy to use, after calibration, put 2 or 3 drops of sample on psm, and towards to light, quick get the precise readings through eyepiece. 2.DUAL SCALES : The bx sg Refractometer with bx scale and specific gravity scale, measung range bx 0 - 32% (0.2%) and Specific Gravity 1.000 - 1.130 (0.001sg) for non-fermented wort. 3.BEST REPLACEMENT: Accurate bx beer refractometer need less sample solution for Home Brew, brewing , Beer wort making and educational purposes, perfect for replacing your old one or complicated operation drometer. 4.AUTOMATIC TEMPERATURE COMPENSATION: Beer wort refractometer With ATC function can automatically compensation according to changes in ambient temperature, more easier and faster obtain readings and take control of the beer brew process. 5.ALUMINUM BODY MATEAL: The refractometer is made of aluminum and ABS rubber, non-staining, resistant to abrasion and anti-corrosion. Lightweight and portable refractometer easy to carry.nbsp;