The antifreeze refractometer can be used to measure the freezing point of glycol, antifreeze, coolant and battery acid. It can also be used to check the condition of electrolyte solution batteries.Features:Portable design and non-slip rubber grip for easy use.Built-in automatic temperature compensation (ATC) for faster results.With measurement level for direct reading.Adjustable manual focus, easy to focus and calibrate.Comes with a case, convenient for storage and portable for use.Measurement of the freezing point of automotive antifreeze based on ethylene glycol or propylene glycol. Scale Range: Ethylene Glycol Based: 32 to -84 degrees F, Propylene Glycol Based: 32 to -60 degrees F.Features:Color: black + silver + blueMaterial: ABSMeasurement range:Ethylene Glycol: -84~32CPropylene Glycol: -60~32CBattery fluids: 1.10~1.40 kg/lItem Size: Shown As PicturePackage size: approx. 20.5 * 7.5 * 5.5cm / 8.1 * 3 * 2.2inPackage weight: approx. 250g / 8.82ozPackage list:1 * Antifreeze Refractometer1 * flat screwdriver1 * cleaning cloth1 * straw1 * User Manual