Specifications： ---Ethylene Glycol: -50°C-0°C ---Propylene Glycol: -50°C-0°C ---Cleaning Fluids: -40°C-0°C ---Battery Fluids: 1.100-1.400sg ---Ethylene Glycol: 5°C ---Propylene Glycol: 5°C ---Cleaning Fluids: 10°C ---Battery Fluids: 0.01sg ---Temperature Compensation Range: 10°C-30°C Features: ---Durable and built to last long. ---Heavy-duty and lightweight with its aluminum construction. ---Easy to focus and calibrate. ---Accurate testing results guaranteed. ---Made with the highest and finest quality of aluminum & rubber that makes it lightweight. ---Cushioned with soft & comfortable non-slip rubber. Package Includes: 1 x Portable Refractometer 1 x Mini Screw Driver 1 xSuction tube 1 xProtective carrying case 1 xUser Manual