Features 1、Refractive index is made according to different refractive index of liquid, small and accurant. 2、Simple and easy-to-understand operation method can be convenient for your use. 3、Wide range of application helps refractometer suitable for most liquid sugar test. 4、Easy to use, sturdy refractometer is compact in size and light in weight, convenient to keep up and carry around. 5、For practical adoptability, refractometer's high quality can keep its high performance for a long time. Specification Item Type: Refractometer Model: RHB-90ATC Sugar Test Range 0-90% Measurement Accuracy: 0.1% Material: Aluminum Automatic Temperature Compensation (ATC): 10℃~30℃ (50℉~86℉) Package List 1 x Refractometer 1 x Dropper 1 x Screwdriver 1 x User Manual 1 x Cloth(color random)