4-in-1 electronic tester and quick measurement: This pH meter is designed in 4-in-1 format for testing the quality of liquids. Know the pH, water quality, EC and temperature of your water in just 5 seconds. Professional tester: The electronic pH meter has a sensitive dual-electrode sensor and a high-grade titanium probe, which can accurately read water quality levels. Equipped with reliable automatic temperature compensation to ensure accurate readings at different temperatures every time. And the backlight is used to make the data display clearer. You can easily view the data even in dark environments. Auto Calibration and Auto Power Off: The tester is capable of automatic three-point calibration. Calibrated for use, no adjustment required before use. It is very convenient to use. At the same time, when you don't use our pH meter for 5 minutes, it will automatically shut down, extending the service life of the product. Multiple Applications: 4 in 1 pH meter can be widely used for: testing pH and quality of drinking water, aquarium, swimming pool, spa and wine, tap water, well water, sea water, amniotic fluid, breakthrough, aquaculture, food. Treatment, saliva, enzymes, chemical experiments, ionized water, pH value of human urine, etc. It can help you distinguish the water quality in your daily life.