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. Measuring freezing point of automobile antifreeze based on ethylene glycol or propylene glycol. Scale Range: ethylene glycol based: 32 to -84 degree F, propylene glycol based:32 to -60 degree F. Specifications: Color: Black + Silver + Blue Material: ABS *Measuring Range: Ethylene Glycol: -84~32F,0~-50C Propylene Glycol: -60~32F,0~-50C Battery Fluids: 1.10 ~ 1.40kg 1.10-1.20 rechage 1.20-1.25enough power 1.25-1.40 Good Vehicle urea concentration:30%-35%,Good effect at 32.5%. Item Size: shown as picture Package Size: Approx. 20.5 * 7.5 * 5.5cm / 8.1 * 3 * 2.2in Package Weight: Approx. 250g / 8.82oz Package List: 1 * Antifreeze Refractometer 1 * Slotted Screwdriver 1 * Cleaning Cloth 1 * Straw 1 * User Manual