Feature 1Brix refractometer has a wide measurement range and is suitable for almost any sugarcontaining substance. 20 to 50 high range detection, high accuracy, resolution, and wide application. 3Elegant color and stylish design, compact size and portable, easy to carry anywhere and anytime. 4With automatic temperature compensation function, ranging from 10 to 40. 5Power saving, after 3 minutes without any operation, it will automatically turn off the power.Item Type: RefractometerMaterial: PlasticColor: As shown in the pictureProduct Size: Approx.121x58x25mm/4.76x2.28x0.98inWeight: Approx.313g/11ozRange: 0 to 50% Brix / 0 to 80C Resolution: 0.1% Brix/0.1C Accuracy: 0.2% Brix/0.3C Automatic Temperature Compensation: 10-40C.Measuring Time: About 1.5 secondsMinimum Sample Size: 2 metric dropsLight Source: Yellow LEDAutomatic Power Off: After 3 minutes of non-operationPower Supply: 1 x AAA battery (not included)Start using after installing the batteryCalibration method: The instrument only supports pure water calibration. The calibration method is as follows:1. Drop 4-5 drops of purified water into the drip opening2. Press the "Calibration" key for 2 seconds to enter the calibration state.3. Press the "Calibration" button once to start calibration.If you don't press any button, it will return to the power-on state after 10 seconds.4. After the calibration is completed, you can put the liquid to be measured on the drip port, close the lid, and the reading will be displayed for a moment .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Refractometer(Battery Not Included)1 x Dropper1 x Instruction Manual1 x Protective CaseNote1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.