Description: This water quality tester is designed to test pH and chlorine level for swimming pool and spa. It is easy to operate, no more chemicals need. Large screen quickly shows the test result with high precision. Light weight and compact, easy to carry. Features: 1. Made of premium plastic shell, durable and sturdy. 2. Easy to operate, no more chemicals need. 3. A convenient tool to test water pH and chlorine level for swimming pool and spa. 4. Large screen displays the test result on pH and chlorine level for easy and accurate reading. 5. Light weight and compact, easy to carry. With a hole for convenient hanging. Specifications: Condition: 100% Brand New Material: Plastic + Metal Color: Gray White Size: approx. 18 x 11.6 x 3.1cm / 7.1" x 4.6" x 1.2" Power Supply: 1 x 1.5V AA Batteries(not included) Recommended chlorine level for pools and spas: 1.2 ~ 1.7ppm Recommended pH level for pools and spas: 7.2 ~ 7.8pH Package Weight: 220g Quantity: 1pc Package Included: 1 x Water Quality Tester Attention: 1. Please don't immerse the probe in any liquid other than pool or spa water. 2. Please rotate the switch to close position when not in use. 3. Please store the tester in cool and dry place. Usage: Before you use this tester for the first time, you must adjust it to match your swimming pool or spa water with the following sequence: 1. Test your pool or spa water using a conventional liquid test kit 2. Record the chlorine reading level as you will need. 3. No adjustment is required for pH. How to find adjustment point for chlorine testing: 1. Insert 1pc AA 1.5V battery in the compartment in the handle. 2. Hold the tester in one hand and the probe in the other. 3. Insert the cleaned metal probes into the water up to black band. 4. Stir the water slightly with the probe. 5. With the probe still in the water, turn the wheel on the face of the tester all the way to the left towards"CL". Slowly turn the wheel back to the right until the needle matches the chlorine level you recorded with the convention liquid tester(e.g.: 1.5ppm) 6. Remove probes from the water without touching the wheel. Indicator will move all the way to the right and stop on a letter between A and E. This letter is your "adjustment point". Note: Any time you use this tester to test the chlorine level, you must adjust it to the "adjustment point" before testing. Testing Chlorine Level: Recommended chlorine level for pools and spas: 1.2 ~ 1.7ppm 1. Position the needle to your "adjustment point". 2. Holding the tester in one hand and the probes in the other, insert the probes into the water up to the black band. Wait until the needle rests for a better chlorine reading. 3. Leave the probes in the water. Test pH Level: Recommended pH level for pools and spas: 7.2 ~ 7.8 1. With the probes still in the water, turn the wheel all the way to "pH" until it clicks(battery must off for pH reading). 2. Wait until the needle rests on the pH reading. 3. Gently dry probes and insert into the holder on the side of the tester for storage.