[Fast and accurate] With the precise pH accuracy (0.01) of the tester, make sure that your pool, the general pH value or even your drinking water has a perfect pH balance and can be used safely. The tester has a sensitive electrode sensor to read accurate pH values. The included detailed manual shows you how to get the most accurate and stable readings. [Already calibrated] The pH meter is already calibrated at the factory. Only with frequent use or after 6 months a re-calibration is required. The calibration powder is included. [Easy to use] The pocket-sized pH meter is the ideal test kit for home and laboratory use. Ideal for testing water, pools, aquariums, spas, hydroponics, food, wine and beer making and more. [Automatic calibration] The pH meter has an automatic calibration function that can be adjusted according to water temperature and quality, and the pH value can be retrieved by waiting only a few seconds when testing. Calibrate the tester with the one-touch "CAL" button using Calibration Buffer Powder, which are included. [Complete accessories] With 1 x pH meter, 1 x user manual (English language not guaranteed), 2 x 1.5 V LR44 button cells (built-in), 3 x pH buffer powder. The enclosed detailed manual shows you how to get the most accurate and stable readings.