General description This 4-in-1 Electronic pH Meter is designed to test the quality of liquids, providing quick and accurate measurements of pH, TDS, EC, and temperature in just 5 seconds. It is ideal for various applications including swimming pools, aquariums, drinking water, and more. Technical specifications pH measurement range: 0 - 14 pH, accuracy: ±0.01 pH TDS measurement range: 1 - 19999 ppm, accuracy: ±2% FS EC measurement range: 1 - 19999 μS/cm; 0.1 mS/cm Temperature measurement range: 0.1 - 60 °C, accuracy: ±0.5 °C Usage Remove the cap and immerse the electrode in the liquid to obtain readings. Automatic calibration at three points ensures accurate measurements without prior adjustments. Backlit display allows for easy reading of data even in low-light conditions. Other information Automatic shutdown feature activates after 5 minutes of inactivity to extend battery life.