PH/CL2 Water Quality Tester -- This water quality tester is designed to test pH and chlorine level for swimming pool and spa.A large screen quickly displays the test result with high accuracy.Lightweight and compact, easy to carry.Tips: When measuring the chlorine value, you need to match the CL value standard solution of 1.5 PPM, which is not included in the packing list.Measuring Range -- The large screen displays the test result on pH and chlorine level for easy and accurate reading.Chlorine level within the safety measurement range: 1.2-1.7 ppm.pH level within safe measuring range: 7.2-7.8.Application -- This tester is for testing water pH and chlorine level for swimming pool, saunas, aquarium and spa.Ideal for drinking at home, pond, etc.Material -- This tester is made of premium plastic shell, durable and sturdy.Battery: 1 “AA” 1.5 V alkaline battery (not included).Storage method - 1.When not in use, please turn the knob to the off position (in PH direction until it can no longer be moved).2.Store in a cool, dry place and avoid direct sunlight.3.Do not immerse the test rod in any liquid other than swimming pool water and hot spring water.