The antifreeze refractometer can be used for measuring the freezing point of glycol, antifreeze, coolant and battery Acid. It can also be used for checking the condition of electrolyte solution batteries. Features:Handheld design and non-slip rubber handle for easy operation.Built-in automatic temperature compensation(ATC) to get 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.Great for wine making, agricultural, gardening & educational purposes.Specifications:Color: Black + Silver + BlueMaterial: ABS*Measuring Range: Ethylene Glycol: -50~0CPropylene Glycol: -50~0CCleaning Fluids: -40~10CBattery Fluids: 1.10 ~ 1.40sg Item Size: Approx. 15.5 * 4cm / 6.1 * 1.6inItem Weight: Approx. 87g / 3.1ozPackage Weight: Approx. 228g / 8oz Package Size: Approx. 20.5 * 7.5 * 5.5cm / 8.1 * 3 * 2.2inPackage List:1 * Antifreeze Refractometer1 * Slotted Screwdriver1 * Cleaning Cloth1 * Straw 1 * Case 1 * User Manual(English)