The antifreeze refractometer measures the freezing point of glycol, antifreeze, coolant, and battery acid. It can also be used to check the condition of electrolyte solution in batteries. Features: - Portable design with non-slip rubber grip for ease of use - Built-in automatic temperature compensation (ATC) for quick and accurate results - Direct reading scale for easy measurement - Adjustable manual focus for clear viewing and calibration - Includes a carrying case for convenient storage and portability - Measures freezing point of automotive antifreeze based on ethylene glycol or propylene glycol Scale Range: - Ethylene Glycol Based: 32 to -84°F - Propylene Glycol Based: 32 to -60°F Specifications: - Color: Black + Silver + Blue - Material: ABS - Measurement Range: - Ethylene Glycol: -84 to 32°C - Propylene Glycol: -60 to 32°C - Battery Fluids: 1.10 to 1.40 kg/L - Item Size: As shown in picture - Package Size: Approx. 20.5 x 7.5 x 5.5 cm (8.1 x 3 x 2.2 in) - Package Weight: Approx. 250 g (8.82 oz) Package List: - 1 x Antifreeze Refractometer - 1 x Flat Screwdriver - 1 x Cleaning Cloth - 1 x Straw - 1 x User Manual