Analyzes four chemical factors: free chlorine, bromine, alkalinity and pH.Immerse them in water for instant reading; the pads without bleeding ensure accurate color reading.To maintain healthy water chemistry in the swimming pool or spa.Quick test: You only need to immerse the pool test paper in the water for 2 seconds, then remove it from the water and hold the test paper horizontally for 15 seconds, and compare it with the color card on the bottle to get the test result. It is simple and easy to operate. The first-time user can also use it easily.Convenient to carry: Our bottle is small in size and light in weight. Whether you are going for a swim or a hot spring, you can put it in a bag and carry it easily. You can use it to detect the sanitation of swimming pools or hot springs.Easy to save: We designed dark bottles for 50 pool test strips are stored in dark bottles to effectively avoid the impact of light on the test strips. The bottle has a good seal to ensure the long-term storage of test strips. It is recommended that you close the cap immediately after removing the test strip.Wide range of application: Our dip test paper has a very wide range of application. It can detect the water quality of drinking water, aquariums, swimming pools, spas, ponds, hot springs and other places. And our test paper can make the detection value more stable and accurate.Colour: Photo ColorMaterial: paperPackage Contents:100 * Test strips (50 strips per bottle)Only the above package content, other products are not included.Note: Light shooting 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.