Features: 1. Essential tool to test water for swimming pools, saunas and spa. 2. Wonderful tool for simple measurement of pH and CL2 values of water. 3. No chemical composition, safe to use, fast measurement and accurate 4. Chlorine level safe measurement range: 1.2-1.7ppm 5. PH value level safe measurement range: 7.2-7.8 6. Battery: Use 1 AA battery Specification: Type: PH CL2 Tester Chlorine level safe measurement range: 1.2-1.7ppm PH value level safe measurement range: 7.2-7.8 Battery: Use 1 AA battery(not included) Chlorine test-adjustment points: Before 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 tester 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 of the meter toward CL until it can be no longer moved. Then slowly turn back to the right until the pointer points to the traditional The position of the result measured by the liquid test tool (eg 1.5). F. Remove the tester 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. Note: Before each test of chlorine gas, the meter must be adjusted to the "adjustment point". Test pH: The recommended chlorine content for swimming pool water or hot spring water is 7.2 to 7.8 A) Leave the tester 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). B) Wait for the pH reading after the pointer stops swinging. C) Gently dry the tester rod, insert it into the slot next to the tester and store it. Test the chlorine content: The recommended chlorine content for swimming pool water or hot spring water is 1.2 to 1.7 ppm A) Set the pointer to the "adjustment point" position. B) Hold the tester in one hand and the tester rod in the other. Insert the metal rod into the water to the black position. Take a reading after the pointer stops swinging. C) Leave the tester stick in the water and continue the pH test according to the instructions. Storage method: In order to extend the service life of the swimming pool tester and ensure measurement, 1. When not in use, set the knob to the off position (in the direction of PH until it can be no longer moved). 2. Store in a cool, dry place, away from direct sunlight. 3. Never immerse the tester rod in any liquid other than swimming pool water and hot spring water. 4. Regularly check whether the battery is sufficient-the tester uses an "AA" 1.5 V battery includes: 1 x PH CL2 Tester