Features:Water quality PH/CL2 chlorine tester- Great for simple operations to test water PH and CL2, no more chemicals or no more guessing work.Light weight and handy.- Simple and easy to operate. Get results instantly and accurately.Large screen- Large screen shows the tests result on both PH and Chlorine level for easy reading.Application- An essential tool for swimming pools, saunas and hot springs.Powered by- 1*AA battery only ( Not included)Note:Please allow 1-2cm errors due to manual measurementItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated sameSpecification:Colour: As shownMaterial: PlasticSize: About 17.5*11.6*3.1 cmChlorine level in the safe measurement range: 1.2-1.7ppmPH value level within safe measurement range: 7.2-7.8Package included:1 x Water Quality PH/CL2 Chlorine TesterProduct instructions:Chlorine test-adjustment points:Before the first use, please adjust the tester for the swimming pool water or hot spring water to be tested in the following order:1. Use traditional liquid testing tools to test swimming pool water or hot spring water;2. Record the chlorine gas reading for backups (1.5PPM);3. No need to adjust the PH.Find the adjustment point of the tester:A. Put an AA 1.5 V battery (positive side up) in the battery slot of the handle.B. Hold the tester in one hand and the tests stick in the other.C. Insert the cleaned metal rod into the water to the black position.D. Use a metal rod to gently stir the water.E. While keeping the metal rod in the water, turn the knob on the front toward CL until it can no longer move. Then slowly turn back to the right until the pointer points to the position of the result measured by the traditional liquid test toolTest the chlorine content:1. Adjust the pointer to the "adjustment point" position.2. Hold the tester in one hand and the tests rod in the other, and insert the metal rod into the water to the black position. Take a reading after the pointer stops swinging.3. Leave the tests stick in the water and continue the pH test according to the instructions.Test pH:1. Leave the tests stick in the water, and turn the knob toward the pH to make a beeping sound (the battery must be taken out when reading the pH value).2. Wait for the pH reading after the pointer stops swinging.3. Gently dry the tests rod, insert it into the slot next to the tester and store it. F. Remove the tests rod from the water, being careful not to move the knob. The pointer will slide to the right and stop with a letter between A and E. This letter is the adjustment point.Please note: Before each test of chlorine gas, the meter must be adjusted to the "adjustment point".