??Easy to UseRemove the protective cap and turn on the pH meter by pressing the "ON/OFF" key, immerse the electrode in the test solution to be tested, stir gently, and wait until the reading stabilizes. After finished, clean the electrode with distilled water, turn off the pH meter, and replace the protective cap. ??High Accuracy PH MeterPH meter use sensitive glass bulb electrode sensor that can quickly and clearly read accurate PH values in the 0-14.0 measurement range. This accurate PH tester kit (0.01 resolution) is so accurate, it can accurately test a PH of 0.01. ??Automatic CalibrationThe PH meter has an automatic calibration function, which can be adjusted according to the water temperature and water quality. It only takes a few seconds to get the PH value. Besides, you can also use the "calibration buffer powder" to calibrate the tester via the one-touch button "CAL". ??Automatic Temperature CompensationThe product provides full PH 0-14 measurements with temperature compensation which will make the result more accurate. The temperature of the testing liquid can vary from 0C - 60C (32F - 140F). ??Wildly ApplicationConveniently fits in your pocket or bag and goes anywhere. PH meter is an ideal option for families and laboratory testing PH value, which suitable for the testing PH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics; Appropriate for a wide range of applications.