<p>[WIDE RANGE MEASUREMENT] The refractometer offers a wide measurement range suitable for various sugar-containing substances.</p> <p>[HIGH ACCURACY] With 0-50% high range detection, this refractometer provides precise and accurate readings.</p> <p>[PORTABLE DESIGN] Compact and stylish, this refractometer is easy to carry anywhere for on-the-go testing.</p> <p>[TEMPERATURE COMPENSATION] Equipped with automatic temperature compensation from 10\u2103 to 40\u2103 for consistent results.</p> <p>[POWER SAVING] Features automatic power-off function after 3 minutes of inactivity to save battery life.</p> <p>Item Type:Refractometer</p> <p>Size:.121x58x25mm\/4.76x2.28x0.98in</p> <p>Weight:.313g\/11oz</p> <p>Range:0 to 50% \/0 to 80\u2103</p> <p>Resolution:\u00B10.1% \/\u00B10.1\u2103</p> <p>Accuracy:\u00B10.2% \/\u00B10.3\u2103</p> <p>Automatic Temperature Compensation:10-40\u2103</p> <p>Measuring Time:About 1.5 seconds</p> <p>Minimum Sample Size:2 metric drops</p> <p>Light Source:Yellow LED</p> <p>Power Supply:1 x AAA battery (not included)</p> <p>Start using after installing the batteryCalibration method: The instrument only supports pure water calibration.</p> <p>The calibration method is as follows:</p> <p>1. Drop 4-5 drops of purified water into the drip opening</p> <p>2. the Calibration key for 2 seconds to enter the calibration state.</p> <p>3. the Calibration button once to start calibration.If you don't any button, it return to the power-on state after 10 seconds.</p> <p>4. After the calibration is completed, you can put the liquid to be measured on the drip port, close the lid, and the reading be displayed for a moment</p> <p>Colour:As Shown</p> <p>Material:Plastic</p> <p>Package Contents:</p> <p>1 x Refractometer(Battery Not Included)</p> <p>1 x Dropper</p> <p>1 x Protective Case</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>