Ideal for home or laboratory use; suitable for testing the pH balance of drinking water and pools. Fast and Accurate: The instrument provides fast and accurate results without the use of color charts or messy test strips. It has a resolution of 0.01 and an accuracy of 0.05, and can completely measure the pH range from 0 to 14 Automatic Calibration: The pH meter features automatic temperature compensation that adjusts based on water temperature and quality to get pH readings almost instantly. Micro Convenience: Since the pH meter has built-in (ATC) automatic temperature compensation, you no longer need to care about the temperature of the test liquid, so the pH value of the sample can be accurately measured in any temperature range 0C-80C (32F -176F), very convenient. Practical Safety: Recommended chlorine levels for pools and spas: pH 1.2 to 1.7 ppm for pools and spas, pH 7.2 to 7.8ph Package includes: 1*Tester Note:1. Please allow slight errors due to manual measurement. Please make sure you don't mind before bidding.2. Due to different monitors, colors may vary, please understand. Note:Hello, please pay attention to your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/box without name, etc.) is incorrect, the order will not be delivered correctly. )