Feature: 1. Easy Calibration: The refractometer is easy to use and calibrate, just 1 drop of sample, can easily test Brix, can measure in three seconds. 2. High Accuracy: Digital refractometer is a precise instrument with high measurement accuracy and quick access to accurate readings. 3. Widely Applicable: Sugar meter is suitable for the sugar content of pears, watermelons, grapes, cantaloupe, citrus and other fruits. 4. Lightweight And Portable: Hand held sugar refractometer, compact structure, easy to measure, light and delicate, easy to carry. 5. Professional: Brix refractometer is designed for testing sugar content and specific gravity, ideal for home winemaking, farming, gardening and more. Specification: Item Type: Refractometer Material: ABS Battery Parameters: 1 x AAA Battery (Not Included) Temperature Measurement Range: 0-40℃ Refractive Index: 1.3330-1.5177 Weight: Approx. 307g/10.8oz Measuring Range: Pear, Watermelon, Grape, Cantaloupe, Citrus and Other Fruits. Package List: 1 x Storage Box1 x Dropper1 x Screwdriver1 x Refractometer (Battery Not Included) 1 x Chinese and English Manual