Wide usage: Ideal for home or laboratory use, Compatible with pH balance testing of drinking water, pool, aquarium, system, spa or hydroponics; suitable for a wide range of applications. applications High precision: Ensure your swimming pool, general hydroponics ph.or even drinking water has the perfect pH and can be safely used with a digital pH meter. Auto Calibration: The pH meter has a built-in function automatic temperature compensation that adapts to water temperature and quality to give pH readings almost instantaneously. Automatic temperature compensation: no need to consider the temperature of the liquid to be tested, such as ph.It can accurately determine the pH of the sample at any temperature within the range of 0°C to 80°C (32°F to 176°F) The large Waterproof performance LCD screen allows you to easily read the displayed value. Note: The data is all manual measurement, please allow 1-3cm error; due to the difference in light and display, there there would be some color difference, please refer to the actual item received.