... 1day Easy to use Safe Quick testing: 30seconds Water dispensers tester: Features:Color: YellowPower: 110~220V.ACAdvantage: ... into an electric outlet. Analysis of water electrolysisYellow: dissolved acids, fluoride, and other organic matterGreen: arsenic, mercury, ... , carcinogens, chemical fertilizers, pesticides, etc.Red: Iron and rust, bacteriaWhite: lead, zinc, mercury, inorganic dirtBlack: heavy ...