[FAST AND ACCURATE] With the testers precise pH accuracy (0.01), ensure your pool, general pH level, or even your drinking water has a perfect pH balance and is safe to use. The tester features a sensitive electrode sensor for accurate pH readings. The included detailed manual shows you how to obtain the most accurate and stable readings. [PRE-CALIATED] The pH meter is pre-calibrated at the factory. Recalibration is only required after frequent use or after 6 months. Calibration powder is included. [EASY TO USE] This pocket-sized pH meter is the ideal test kit for home and laboratory use. Perfect for testing water, pools, aquariums, spas, hydroponics, food, wine and beer production, and more. [AUTOMATIC CALIBRATION] The pH meter features an automatic calibration function that adjusts according to water temperature and quality. The pH reading can be obtained by waiting only a few seconds during testing. Calibrate the tester using the one-touch CAL button and the included calibration buffer powder. [COMPLETE ACCESSORIES] Includes 1x pH meter, 1x instruction manual, 2x 1.5V LR44 button cell batteries (built-in), 3x pH buffer powders. The enclosed detailed manual shows you how to obtain the most accurate and stable readings.