[Portable Pool Tester]This water quality tester is designed to test pH and chlorine level for swimming pool and spa. It is easy to operate. As a high accuracy meter, it can tell test result quickly and accurately, screen displays the test result on pH and chlorine level for easy and accurate reading. [Precise Measurement]Before you are using this water PH tester for the first time, pls must adjust the tester to the test point, the accuracy of this device is 0.1,A convenient tool (range of measurement: PH 7.2-7.8).Note: Any time you use this tester to test the chlorine level, you must adjust it to the "adjustment point" before testing. [Wide Applications]PH meter is and compact, easy to carry. Great for home and laboratory ph testing applications including aquariums, swimming pools, tap water, hydroponics, spa, laboratory and scientific testing. [Durable Material]Our water quality tester is made of premium plastic shell, durable and sturdy, easy to operate, no more traditional chemicals needed. Specifications: Measuring Range: PH: 5.5~9.0 Chlorine:0.5~6.0 ppm Size probe (only): about 150mm long Power supply: 1 x AA Alkaline Battery (1.5 V)(without) Recommended chlorine level for pools and spa is 1.2 to 1.7ppm. Recommended pH level for pools and spa is 7.2 to 7.8. Save time and money with this electro-tester. NOTE: Probes are advised NOT to immerse in any liquid other than pool or spa water. Material: plastic colour: as shown Package Contents: 1 x Water Quality Monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.