Function: 1. A pretty essential tool for the pool and spa, ideal for simple PH and CL2 water testing operations. 2. The large screen shows the test result at both PH and chlorine levels for easy reading. 3. Easy to use and instant and accurate result, no chemical use, easy to use. 4. Lightweight and easy to carry, convenient to use, you can save time and money with this elektro-tester. 5. High accuracy, stable and reliable performance, small size, suitable for portable use. Specification: Article type: Water quality tester Material: pcv Color: as shown in the picture! Weight: approx. 216g/7,6 oz Applications: as a water quality detector Application: For aquaculture, swimming pool Check the residual chlorine content: The recommended residual chlorine content for pool water or hot spring water ranges from 1,2 to 1,7 ppm A) Set the indicator to adjustment point. B) Hold the tester in one hand and the test rod in the other. Insert the metal rod into the water into the black position. Take a reading when the indicator stops swaying. C) Leave the tester in water and continue the pH test according to the instructions. PH test: The recommended pH for pool water or hot spring water is 7,2 to 7,8 A) Leave the tester in the water and turn the knob in the pH direction until you hear a click (the battery should be removed when reading the pH value). B) Wait for the pH reading after the indicator stops swaying. C) Gently dry the test rod, insert it into the gap near the tester and store List of packages: 1 x water quality tester 1 x User Manual