Package Included: 1 x pH Meter (Built-in Batteries), 1 x User Manual, 3 x PH Buffer Powders. Precise measurement: Measuring range: 0.0-14.0PH. Resolution: 0.1 pH; Precision: ±0.1pH. With the LCD display, reliable and fast reading. Auto calibration: PH has an automatic temperature compensation feature that adapts to water temperatures and water quality to give pH readings almost instantaneously. Widely Applicable: Ideal for home and laboratory applications such as beverages, drinking water, swimming pools, spas, aquarium, hydroponics, etc. 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. Package Contents: 1 x Digital pH Meter ((Batteries Included) 1 x User Manual Measurement Range: 0.00-14.00 PH Precision error: ±0.01PH Resolution: 0.01 PH Operating temperature: 0°C-80°C Calibration method: automatic