Features:<br /><br />- Durable and built to last long<br />- Uses ambient light only which means battery or power source is not required.<br />- Heavy-duty and lightweight with its aluminum construction.<br />- Equipped with scale measurement which provides direct reading，Easy to focus and calibrate.<br />- Accurate testing results guaranteed<br />- Cushioned with soft & comfortable non-slip rubber<br />- Extremely easy-to-use and calibrate<br /><br />Specifications:<br /><br />- Measuring Range:0-25%Vol，0-40%Brix<br />- Minimum Division: 0.2%Vol，0.2%Brix<br />- Accuracy: ±0.2%Vol，±0.2%Brix<br />- Reference Temperature: 20°C<br />- ATC(Automatic Temperature Compensation) Compensation Range: 10°C~30°C (50°F~86°F)<br />- Manual calibration with mini-screw driver provided<br />- Weight: 165g<br /><br />Package Included:<br /><br />- Portable Refractometer<br />- Mini Screw Driver<br />- Suction tube<br />- Soft protective carrying case<br />- English User Manual