Scope of Application: Digital water tester for measuring chlorine and pH level, suitable for drinking water, swimming pool, spa, fish tank, and aquarium. Accurate Measurement: Recommended ranges for pool and spa: chlorine 1.2 to 1.7 ppm and pH 7.2 to 7.8. Main Function: When pool water is not balanced, sanitizer effectiveness decreases, which can affect skin and eyes. LED Display: Large screen shows the test result and chlorine level for easy reading and recording; easy to operate and easy maintenance. Benefits and use notes: - Provides quick, objective readings to support proper sanitizer use. - Helps maintain water balanced for comfort and safety. - Reduces guesswork in daily water maintenance. Use Scenarios: - At home pool or spa maintenance to keep chlorine and pH in the recommended range. - Aquarium or fish tank care to monitor essential water conditions. - Drinking water testing to verify safe chlorine levels and pH before use.