"Accurate, easy to use, easy to carry, drinking plenty of hydrogen ion-rich water is good for your health. YY-400 / YY-400N is a new high-precision multifunctional water quality tester, which has the functions of measuring PH, ORP, hydrogen ion concentration and water temperature. The measurement data of automatic temperature compensation (0-60 ℃) is updated. It is suitable for testing pH, ORP, hydrogen ion concentration and temperature of household and laboratory water, including swimming pools, ponds, beer, kombucha, aquariums, hydroponics, laboratories, food processing, etc. 1.PHRange: 0.01-14.00pHResolution: 0.01pHAccuracy: ±0.05pH2.ORPRange: ±999mVResolution: 1mVAccuracy: ±2mV3.H2Range: 0-2400ppb; 0.001-2.400Resolution: 2ppb; 2ppmAccuracy: ±10ppb; ±10ppm4.TemperatureRange: 0.1-60.0°C 32.0-140°FResolution: 1℃/°FAccuracy: ±0.5size: 183 x 37 x 37mmMaterial: plasticcolor: black + whitePackage Contents:1 x Digital Pool Water TesterOnly the above package content, other products are not