Usage: With this refractometer clips the ethylene glycol and propylene glycol concentration of frost protection to your car, their solar installation, heat pumps, freezing point disc, heating installation or other machines or water installations to determine. MEASUREMENT RANGE: Ethanediol (ethylene glycol): 0 to -50C Propanediol (propylene glycol): 0 to -50C Windscreen cleaning fluid - ethanol and water: 0C to -40C, propylene glycol and water (SRF1): 0C to -40C. AdBlue: urea concentration 30 percent - 35 percent Acid battery from 1.10 to 1.40 kg or L. Precision measurement: Adapt the optical system of the ey The simple tailoring outlines the body curve and shows a natural and generous temperament. Whether it is daily commuting or casual dating, you can easily control it and wear it to show your unique charm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store