Note: This item comes with plug, please confirm the voltage of your area before purchasing. Description Do you want to test the water quality of your tap water? If so, our water quality tester set is carefully prepared for you. After the solution, the water will show a different color. You can judge water quality by color. Features - Color: As Shown. - Material: Stainless steel, plastic. - Size: 10.50X9.80X2.60cm/4.13X3.85X1.02in - Voltage: . - Plug: plug. - It has wide application ranges, which is great to test the salt, metal or mineral in the water - Great tool set for drinking water, water filtration and purification, hydroponics, aquariums, pools and spas, and more - The instrument consists of an electrolytic rod with positive and negative electrodes - The tester is an effective tool that visually demonstrates the difference - Compact and lightweight, easy to store, this water monitor is not taking up any space Package list: 4 x Set of Water Electrolyzer