This is 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. It is an tool for keeping your pool or spa within the safe chlorine and PH ranges, no more chemicals or no more work. Features - Color: White. - Size: 18 x 12.5 x 2 cm/7.1 x 4.9 x 0.8 inch. - Material: Plastic. - Swimming pool/SPA recommended CL2 content: 1.2-1.7 ppm. - Swimming pool/SPA recommended PH value: 7.2-7.8 ppm. - Essential tool for quick and accurate readings of PH and chlorine as chlorine is the most commonly used disinfectant for water by killing algae and microorganisms. - An tool for keeping your pool or spa within the safe Chlorine and PH ranges, no more chemicals or no more work. - 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. - 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. - Save time and money with this electro-tester.