Usage Tips: Prepare water for inspection - glass with a capacity of 100~150ml, one for tap water and the other for machine water, and empty it on the table. Prepare for inspection - Place the electrolyzer flat on a glass and connect a 220-volt power supply. Inspection: Press the power switch on the electrolyzer to the ON position for inspection. Usually, the inspection time is . First, press the power switch to the OFF position and finally remove the electrolyzer. Note: After the power supply is turned on, hands must not touch the electrodes; do not insert into the test water; do not let children play with the electrolyzer. After using the electrolyzer, dry the electrode with a dry cloth, wipe off the water on the iron with fine gauze, and store it properly. Standard for measuring water: 1. It does not contain substances harmful to the human body and has a peculiar smell (especially heavy metals and substances); 2. The water hardness is moderate, usually between 50-200mg/L (of 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, similar to that of normal liquid. 5. The content of dissolved oxygen and carbon dioxide in water is moderate (dissolved oxygen in water 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 different impurities in water.) Plug Type: EU Plug, it applies to Indonesia, , , , and so on. Size: Approx. 12.5x7x3cm/4.92x2.75x1.18 inches Material: Metal + Plastic Color: Black+Yellow Voltage: AC220V Package Contents: 3 * Water Quality Tester Electrolyzer 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.