General description This 3-in-1 Electronic Swimming Pool pH Tester is designed to measure the quality of various liquids, including drinking water, aquariums, swimming pools, spas, and well water. It ensures the safety of water in daily life and features a green backlight for easy reading. Technical specifications pH Meter: Measuring range: 0.00-14.00 pH Resolution: ±0.01 pH Accuracy: ±0.01 pH TDS Meter: Measuring range: 0-19999 ppm Resolution: 1 ppm Accuracy: ±2% Thermometer: Measuring range: 0-60°C/32-140°F Resolution: 0.1 Accuracy: ±0.5°C Usage The pH tester is user-friendly and features automatic calibration at three points, eliminating the need for adjustments before use. It also includes an automatic temperature compensation function for more accurate test values. To prolong the device's life, it automatically turns off after 5 minutes of inactivity. After use, wipe the device with a clean cloth to keep it dry.