Usage Tips: Prepare water for inspection- glasses with a capacity of 100 ~ 150 ml, one for tap water and the other for RO machine water, and discharge them on the table.Prepare for inspection-Place the electrolyzer flat on a glass and plug in a 220 volt power supply.Inspection: Press the power switch button on the electrolyzer to the ON position to start the inspection.Usually, the inspection time is 30 seconds. At the end, first press the power switch to the OFF position, and finally take out the electrolyzer.Note: After turning on the power supply, hands shall not be caught on the electrodes; Do not put your fingers into the test water; Don't let children play with the electrolyzer. After using the electrolyzer, dry the electrode with dry cloth, wipe the water on the iron pole with fine gauze, and keep it properly.Standard for measuring water quality:1. It does not contain any substances that are harmful to human body and have peculiar smell (especially heavy metals and organic substances);2. The hardness of water is moderate, usually between 50-200mg/L (calculated by calcium carbonate);3. The PH value is weakly alkaline (7.0-8.0);4. The content and proportion of trace elements and minerals in water are moderate, which is similar to that of normal liquid.5. The content of dissolved oxygen and carbon dioxide in water is moderate (dissolved oxygen in water greater than equal 6-7 mg/L).6. The nutritional and physiological functions of water are strong (including solubility, permeability, diffusion, metabolism, emulsification and cleaning power, etc.)(Different colors of electrolyzed water show various impurities in water.)Plug Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on.size:About 12.5x7x3cm/4.92x2.75x1.18 inchMaterial:Metal + Plasticcolour:Black+YellowPackage Contents:2 * Water Quality Tester ElectrolyzerOnly the above package content, other products are not included.Note: Light 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.