Fast Accuracy: The meter can get results quickly and accurately without using messy color charts or test strips. It has a resolution of 0.01, an accuracy of 0.05, can be fully measured in the pH range 0-14, and the pH meter has been calibrated at the factory. Healthy protection: This ph tester and electronic chlorine is a handy tool for testing water pH and chlorine level for swimming pool and spa, Ideal for simple operations to test PH and CL2 of water, no more chemicals or no more guess work. Easy Reading: Large screen displays test result on pH and chlorine level for easy and accurate reading. Discount for Christmas gift. Widely application: This pH meter is very suitable for various tasks, such as swimming pool, tap water, home brewing, laboratory testing, maintenance of the aquarium, etc. Electrical tester for testing pH and chlorine (Cl2) levels in water. It is used to regularly monitor the pH and chlorine content of swimming pools, spas and various water sources. Convenient to carry: Lightweight and compact with a hole for convenient hanging, easy to carry. If you have any questions while using, please email us anytime. Specification: Material: plastic / metal White color Size: 17.5 x 10.8 x 2.7 cm / 6.9 x 4.3 x 1.1 inch Type: Water quality tester Quantity: 1 Pc Chlorine test quick reference test: 1. Clean the probes as instructed in the manual. 2. Turn the wheel to the? Adjustment point? on the meter. 3. Insert the probes into the water up to the level of black plastic. 4. Wait for the needle to rest on a correct reading. pH test: 1.While the probes are in the water, turn the wheel to pH until it clicks into place. 2. Wait for the needle to rest on a correct reading. Warning: 1.Keep the switch in the OFF position when not in use. 2. Store in a cool, dry place away from light sunlight. 3.Check battery regularly for freshness - unit requires 1.5 volt "AA" alkaline battery. 4.Read instructions given -seals before using the tester. 5.Whenever you use the meter to test the chlorine level, you must adjust the meter. Box contents: 1 x water quality tester Without battery