1. Swimming pool and spa water must be disinfected and sterilized with chlorine, and the pH value affects the role of chlorine. If the pH value is too high, the use of chlorine will fail. If the pH value is too low, the chlorine dissolves too quickly, and there is no way to disinfect and sterilize well. When chlorine and pH are unbalanced, swimming pool water can easily cause diarrhea, ear, and skin infections. 2. The 2-in-1 function of the PH & Chlorine CL2 water quality tester allows it to test both the pH value and the chlorine status. The operation is simple and fast, and the data is accurate and easy to understand, which can save you more time and money and make your swimming pool. pH and chlorine values safe. 3. The recommended chlorine level for pools and spas is 1.2 to 1.7 pH, and the pH is 7.2 to 7.8. If your pool or spa water quality is not within this range after testing, you should adjust the pH and chlorine level of your water. 4. Note: It is not recommended to put the water quality testing equipment in water other than swimming pools and spas. Contents: A pH and Cl2 probe tester A user manual (French) A piece of sandpaper. Dimensions: 190 x 120 mm Handle probe: 150 mm Probe only: 48 mm Cable: 300 mm Power supply: 1 AA alkaline battery (1.5 V) (without power supply) Delivery quantity: 1 pieceWelcome to meet