[Smart and portable]: Lightweight, easy to carry and clean, anti-fall [Refractometer range]: range: 0-55%, accuracy: ±0.2% [Easy to operate]: After simple calibration, the reading will be quickly displayed on the screen in less than 3 seconds [Choose a healthier lifestyle]: Great for testing fruits, juices, vegetables, coffee or other beverages, allowing you to control your sugar intake. [Rechargeable]: Equipped with batteries, no need to replace batteries, saving you the cost of buying batteries.