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Large LCD Screen: Large LCD screen with great performance allow you to easily read the displayed value. 2-point automatic calibration: 2-point automatic calibration, automatic identification of standard liquid, 5 seconds to complete calibration. FAST AND ACCURATE: Sensitive sensor contacts directly with the tested solution, fast and accurate. Automatic temperature calibration: concern about the effect of temperature change on pH, the pH value will automatically adjust the temperature. Easy to use: simply remove the protective cap and dip the pH meter electrode into the solution and press the button to be measured.