Auto Calibration: PH has an automatic temperature compensation feature that adapts to water temperatures and water quality to give pH readings almost instantly. Accurate measurement: Measuring range: 0.0-14.0PH. Resolution: 0.1pH; Accuracy: ±0.1pH. With LCD display, reliable and fast reading. Easy to Use: Simply remove the protective cap and immerse the pH meter electrode in the solution. Turn on the pH meter using the ON/OFF switch to measure. Shake gently until the displayed level is stable and read the displayed levels. Widely Applicable: Ideal for home and laboratory applications such as beverages, drinking water, swimming pools, spas, aquarium, hydroponics, etc.