Easy, fast and high accuracy: Just remove the protective cap and immerse the pH meter electrode in the solution and press the ON/OFF button to measure. The tester features a sensitive electrode sensor to read accurate pH levels from 0-14. Ensure your swimming pool, general hydroponic pH or even drinking water has perfect pH balance and provides a safe to 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 instantly . You can also calibrate the tester with just one button using the buffer solution Automatic temperature compensation: No more worrying about the temperature of the liquid to be tested, the pH -meter with built-in Automatic Temperature Compensation (ATC). Thus, it can accurately determine the pH value of the sample at any temperature within a range of 0C to 60C Wide Uses: Ideal for home or laboratory use , suitable for testing pH balance of drinking water, for RO system for aquarium, swimming pool, SPA, or hydroponics. Suitable for a wide range of applications Satisfaction Guaranteed: Comes with 1 x pH Meter, 1 x User Manual, 2 x LR44 1.5V Button Cell Batteries (Integrated )