Feature: 1. PH And Chlorine Testing: Water quality tester is used for testing pH and chlorine (CL2) levels in water, essential tool for quick and accurate readings of pH and chlorine. 2. Wide Range Of Applications: An ideal tool for keeping your pool or spa within the safe Chlorine and pH ranges, no more chemical or no more conjecture work. 3. Important Reference Value: Recommended chlorine level for pools and spa is 1.2 to 1.7ppm, recommended pH level for pools and spa is 7.2 to 7.8ph. 4. ABS Material: Sensitive response, simple operation. CL2 level meter adopts excellent ABS material, eco friendly, firm and sturdy, stable and durable for use. 5. Portable Design: Light weight and in small size, easy to store and carry, can be easily put into your bag, suitable for spa hotel, water park, etc. Specification: Item Type: Water Quality Tester Material: ABS Battery Type: 1 x AA Battery (Not Included) Test chlorine levels: The recommended chlorine concentration for pools and spas is 1.2 to 1.7ppm A) Position the needle to your "adjustment point" B) Holding the ET in one hand and the probe in the other, insert the probe into the water until the black band. Wait for the probe tip to rest for a better chlorine reading. C) Leave the probe in the water and perform a pH test as directed. Test pH: Recommended pH for pools and spas is 7.2 to 7.8 A) With the probe still in the water, turn the steering wheel until "pH" (battery must be off to read pH) B) Wait for the probe tip to stop on the pH reading. C) Gently dry the probe and insert it into the holder on the side of the ET for storage. . Package List: 1 x PH Chlorine Level Tester1 x Manual Note: Anytime you use an electronic tester to test chlorine levels, you must adjust the meter to the "adjustment point" before testing.