High Accuracy PH Meter: The PH meter uses a sensitive glass bulb electrode sensor, which can quickly and clearly read the accurate PH value within the measuring range of 0-14.0. This accurate pH tester kit (0.01 resolution) is so accurate that it can accurately test pH to within 0.01.Automatic Calibration: The PH meter has an automatic calibration function, which can be adjusted according to the water temperature and water quality, and you only need to wait a few seconds to get the PH reading when testing. Likewise, you can calibrate the tester with a one-touch button "CAL" using calibration buffer powder.Automatic Temperature Compensation: The PH meter has a built-in temperature sensor. When the temperature of the sample solution is different from that of the standard solution, the automatic temperature compensation system (ATC) will adjust its temperature to be within 0C-80C (32F-176F).WIDELY TESTED: Conveniently puts in your pocket or bag and can be seen everywhere. The pH meter is ideal for home and laboratory testing of pH, for pH balance testing of drinking water, swimming pools, aquariums, spas or hydroponics; suitable for a wide range of applications.Complete Accessories: Equipped with 1 PH meter, 1 user manual, 2 1.5V LR44 button batteries (built-in), 3 PH buffer powder. The included detailed manual will show you how to get the most accurate and stable readings.