1、Quite an essential tool for swimming pool and spa, Great for simple operations to test water PH and CL2. 2、Large screen shows the test result on both PH and Chlorine level for easy reading. 3、Easy to use and obtain result instantly and accurately, no chemical agent needed, easy to use it. 4、Light weight and easy to carry around, convenient to use, you can save time and money with this electro-tester. 5、High accuracy, stable and reliable performance, small size, suitable for portable use. Condition: 100% Brand New Item Type: Water Quality Tester Material: PVC Color: As shown in the picture Weight: Approx.216g/7.6oz Uses: As water quality detector Application: For aquaculture, swimming pool Power Supply: 1 x AA battery(Not included) Test the Residual Chlorine Content: The recommended residual 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 test 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 test rod in the water and continue the pH test according to the instructions. Test PH: The recommended pH for swimming pool water or hot spring water is 7.2 to 7.8 A) Leave the test stick in the water, and turn the knob toward the pH direction until it clicks (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 test rod, insert it into the slot near to the tester and store it 1 x Water Quality Tester 1 x Instruction Manual