[New Upgrade Water Electrolyzer] This water quality tester is small and lightweight, strong and durable. It features two electrode rods—one iron and one aluminum—to test water quality. [Fast and Convenient] This water quality electrolyzer provides a convenient method for testing water quality. [Easy to Use] With simple operation, this water quality tester delivers quick and convenient water testing. [Perfect Replacement] This water contamination tester serves as a quick and convenient alternative to test paper and liquid test kits. [Wide Applications] This water quality tester can assess the condition of water. It is suitable for drinking water, water filtration and purification, hydroponics, aquariums, swimming pools, and spas. Handy: Easy to use, quick testing with clear results. Simple installation, lightweight, portable, and cost-effective for checking drinking water quality. Water color changes after electrolysis indicate the presence of various impurities. Voltage: 220V Plug Type: EU Plug (compatible with Indonesia, Germany, Spain, etc.) Color: Black + Yellow Material: Plastic + Metal Package Contents: 1 x Water Quality Tester Warning: Do not hold the electrodes with bare hands when powered on. Do not place fingers in the test water. Keep out of reach of children. After use, wipe electrodes dry with a clean cloth; remove moisture from the iron rod using gauze before storage. Contents listed above only; other items not included. Note: Screen and lighting conditions may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.