[New Upgrade Water Electrolyzer] This water quality tester is compact and lightweight, with a durable construction. It features two electrode rods—one iron and one aluminum—for effective water quality testing. [Fast and Convenient] This electrolyzer provides a quick and convenient method for assessing water quality. [Easy to Use] Simple operation allows for rapid and straightforward water quality testing. [Perfect Replacement] A practical alternative to test strips and liquid test kits. [Wide Applications] Suitable for testing drinking water, water filtration and purification systems, hydroponics, aquariums, swimming pools, and spas. Handy and portable: easy to install, lightweight, and simple to carry. Offers quick testing with clear visual results. The water changes color during electrolysis to 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 Note: Do not touch the electrodes with bare hands while the device is powered on. Do not immerse fingers in the test water. Keep out of reach of children. After use, wipe the electrodes dry with a clean cloth; gently remove moisture from the iron rod using gauze before storage. Package includes only the item listed above. Other accessories are not included. Note: Monitor settings and lighting conditions may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.