[ upgrade water electrolyser] This water quality tester is small and light, strong and . It has positive and negative 2 electrode rods (one is an iron rod and the other is an aluminum rod) to better test the water quality. [Fast and Convenient] This water quality electrolyzer offers you a convenient way to test water quality. [Easy to use] With our simple operation, our water quality testers offer you a quick and convenient way to test the water quality. [ Replacement] This water contamination tester is a quick and convenient alternative to traditional test paper and liquid test kits. [Wide Applications] This water quality tester can be used to test the degree of purity of water. It's for drinking water, water filtration and purification, hydroponics, aquariums, swimming pools, and spas. Handy: easy to use, quick testing with clear test results. It's easy to install, easy to use, , easy to carry, it's a simple and inexpensive way to test water quality, check the condition of your drinking water. The water appears to differ in color after electrolysis to indicate impurities in the water. Voltage: 220V Plug Type: EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Colour: Black+yellow Material: Plastic + Metal Package Contents: 5 x Water Quality Tester Note: Do not hold the electrode with your hands when it is switched on. Do not put your finger in the test water. Do not let children play with the . After the electrolyzer has been used up, a dry cloth is placed on the electrode to dry and the water on the iron pole is wiped off with gauze and well preserved. 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.