Buyinhere&trade; High Quality Water Electrolyzer Electrolitic Device, Water Purity Level Tester Checker Easy to operate and quick, obvious to get result . provide us with the simple and economy way to test water quality. Used to test the water purity level,the client can see the condition of drinking warter. Testing methods: 1.Prepare for water-using white glass with 100-500ml water capacity,one glass is filled in running water and the other glass is filled in RO pure water,put them in the table side by side. 2. Prepare for testing-put the eletrolyzer in the glass ,then insert to the power. 3.Testing-turn on the button "on",and test for 30 seconds,then turn on the "off",remove the water electrolyzer. Voltage:110V-220VMaterial size:99.5 x 35.6 x 24.8mm; metal pillar: 74mm x 7.8(L x dia); cable length:105cm Package Included: 1 x Water Electrolyzer