Whitelotous Electrolyzer Quick Water Quality Testing Electrolysis Iron Bars TDS Tester Very Easy to operate , quick testing, obvious results. simplest and cheapest way to test the water quality. buy your self & see the condition of your drinking water. The electronic color tester is an effective sales tool that visually demonstrates the difference between high TDS water and low TDS water. Voltage: 220 V Power cord length: 80 cm Iron bars Length: 7 cm