About This High Precision & Quick Results: Achieve accurate sugar content measurements in seconds, with a 0-55% range, ±0.1% precision, and resolution of ±0.1%. Simple Calibration & Fast Results: Achieve accurate readings in just 2 seconds with only 0.2ml of sample. Calibration is quick and simple—just use a few drops of pure water and press the "Zero" button, no calibration solution needed. Clear OLED Display: The large OLED screen ensures easy reading of brix, temperature, and battery status, providing all the essential data at a glance. Durable & Waterproof (IP67): Built to withstand tough environments, this refractometer is IP67 waterproof and drop-resistant, perfect for testing sugar content in fruits, syrups, juices, and other liquids. Compact & Rechargeable: The portable, user-friendly design is Bluetooth-enabled for data sharing and is rechargeable in just 3.5 hour, lasting up to 30 days on a full charge.