General description A comprehensive 4-in-1 water quality testing kit designed for various applications including tap water, regeneration, aquariums, and swimming pools. This compact and lightweight digital pH meter and TDS tester is easy to carry, making it ideal for on-the-go use. Technical specifications pH measurement range: 0.00 to 14.00 pH resolution: 0.01 pH pH accuracy: ± 0.05 pH TDS measurement range: 0 to 19,990 ppm Conductivity measurement range: 0 to 19,990 µS/cm TDS accuracy: ± 2% Automatic temperature compensation (ATC) Automatic shutdown after 9-10 minutes of inactivity Compatibility and accessories Includes a TDS-EC measuring device tester Includes a pH tester Comes with 3 pH calibration bags Includes user instructions Installation No tools required for calibration; simply remove the protective cover and immerse the pH meter electrode in the solution. Press ON/OFF to activate the meter, stir gently, and wait for stable readings. Usage Ideal for testing the quality of