Accurate pH tester – pH meter with a sensitive electrode sensor, featuring a 0–14.0 measuring range to quickly and easily read pH levels. This accurate pH tester kit offers 0.01 resolution, providing precise readings within ±0.01 pH. Simple calibration – The pH meter includes 3 pH calibration powder packets. Press the calibration button (CAL) and immerse the tester in the pH buffer solution for several seconds; the meter will automatically calibrate. Automatic temperature compensation – The built-in automatic temperature compensation (ATC) system adjusts for temperature differences between sample and standard solutions, ensuring accurate pH measurements within a temperature range of 0°C–60°C (32°F–140°F). Wide application – This digital pH meter is ideal for home and laboratory use. The pH pen is suitable for testing water, swimming pools, aquariums, spas, hydroponics, wine, and beer. Attention – When not in use, always replace the protective cap. Exposure of the glass electrode to air may cause measurement errors and unstable readings, affecting the performance of the pH meter. Material: Plastic Color: As shown Package Contents: 1 x pH tester Note: The package includes only the items listed above. Light reflection and display differences may cause slight variations between the color in the image and the actual product. Measurement may vary by ±1–3 cm.