Features: 1Essential tool for quick and accurate readings of ph & chlorine as chlorine is the most commonly used disinfectant for water by killing bacteria algae and microorganisms. 2An ideal tool for keeping your pool or spa within the safe Chlorine and PH ranges no more chemicals or no more speculative work. 3An electro-tester for testing pH and chlorine (Cl2) levels in water for routine monitoring of pH and chlorine levels of swimming pools spas and different water sources. 4Save time and money with this electro-tester. 5It just has one switch easy to use simple design of one switch to test pH and CL2. Specification: When chlorine and pH levels go out of whack it can lead to diarrhea and ear and skin infections. A good chlorine & pH level keeps bad bacteria at bay: If pH goes up too high chlorine's germ-killing power deflates. Chlorine can also get eaten up if a lot of nitrogen (from debris pee sunscreen or sweat) or other organic matter gets in the pool. That's why it's best to test chlorine and pH levels all the time- they can change day to day based on pool usage. Keeping your pH levels within the proper range is important for keeping your equipment and pool finish intact. Your chlorine will dissolve quicker with a low pH level. High pH levels make chlorine inactive. Features: Essential tool for quick and accurate readings of ph & chlorine as chlorine is the most commonly used disinfectant for water by killing bacteria algae and microorganisms. An ideal tool for keeping your pool or spa within the safe Chlorine and PH ranges no more chemicals or no morespeculativework. An electro-tester for testing pH and chlorine (Cl2) levels in water for routine monitoring of pH and chlorine levels of swimming pools spas and different water sources. Save time and money with this electro-tester. It just has one switch easy to use simple design of one switch to test pH and CL2. Specification: Condition:100% NewMaterial: ABSColor: As shown in the pictureMain Unit:Approx.190X20mm / 7.5X0.8inHandle Probe:Approx.150mm / 5.9in(L)Probe (only):Approx.48mm / 1.9in(L)Battery:1X 1.5V AA battery(Not included) Recommended chlorine level for pools and spa is 1.2 to 1.7ppm Recommended pH level for pools and spa is 7.2 to 7.8 Package List: 1 xPH/CL2 Meter 1 xManual Note: The detector will not recommend immersion except for pool or spa water.