Easy, fast and high precision: Simply remove the protective cap and immerse the pH meter electrode in the solution and press the ON/OFF button to measure. The tester has a sensitive electrode sensor to read accurate pH levels from 0 to 14. Ensure your swimming pool, general hydroponic pH or even drinking water is in perfect pH balance and offers risk-free use.Auto Calibration: Auto Calibration: The pH tester has an automatic temperature stabilization feature that adjusts to temperatures and water quality to give pH readings almost instantaneously. You can also calibrate the tester with just one button using the buffer solution.Automatic temperature compensation: You no longer need to worry about the temperature of the liquid being tested, as the pH meter has built-in automatic temperature compensation (ATC). Thus, it can accurately determine the pH value of the sample at any temperature within the range of 0C to 60C.Wide uses: Ideal for home or laboratory use, suitable for testing the pH balance of drinking water, for RO systems for aquariums, swimming pools, SPAs, or hydroponics. Suitable for a wide range of applications.Satisfaction Guaranteed: Supplied with 1 x pH meter, 1 x user manual, 2 x 1.5V LR44 button batteries (integrated).