Features: Made of premium materials, compact and lightweight, sturdy and durable to use. Simple and cheap way to test the water quality, see the condition of your drinking water. Easy to operate, quick testing with obvious testing results. The water after electrolysis appears different color to show various impurities in the water. Ideal tool set for drinking water, water filtration and purification, hydroponics, aquariums, pools and spas, and more. Using methord: 1. Ready to test the water, take two a capacity of 100 to 150ml of white glass, a glass of running water, warer purification equipment machine pick another cup of water, and discharged on the table. 3. Inspection: Press the button to ON position to start testing, the usual time for testing is 30 seconds. Testing Analysis Results: Yellow: dissolve Sanso, silicon compounds, organic minerals, molybdenum, silicon, fluoride, other organics Green: arsenic (arsenic), mercury, lead, copper, sodium Blue: bacteria, viruses, carcinogens, organic phosphorus (fertilizers, detergents and pesticides) Red: iron and rust, bacteria White: lead, zinc, mercury, inorganic dirt Black: heavy metals (zinc, lead, copper, chromium, manganese, cadmium) Water quality standards: Does not contain any harmful substances and odors (especially heavy metals and organic compounds). Softness and hardness of water, usually between 50-200mg / L (as calcium carbonate). PH value between weakly alkaline (7.0-8.0). Water and trace elements, and the proportion of moderate mineral content, similar to the normal liquid; Dissolved oxygen and carbon dioxide content of moderate (dissolved oxygen ≥6-7mg / L). Water stronger nutritional physiological functions (including dissolution, penetration, diffusion capacity, metabolic power, emulsifying power, clean power, etc.). Safety warning 1. When powered on, do not grasp the electrode with your hands. Do not insert your finger into the test water. Don't let children play the electrolyzer. 2. After the electrolyzer is used up, dry cloth is applied to dry the electrode, and the water on the iron pole is wiped with gauze and properly kept. Specification: Condition: 100% Brand New Material: Plastic, Metal Main Color: Black Size: approx. Weight: approx.164g/5.78oz Package List: 1 * Water Electrolyzer Set