7-Way Test Strips for Free Chlorine, Total Chlorine/Bromine, pH, Alkalinity, Plus - 50 Strips voltage_12V Battery The thickness of the grid

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7-Way Test Strips for Free Chlorine, Total Chlorine/Bromine, pH, Alkalinity, Plus - 50 Strips voltage_12V Battery The thickness of the gridThe Taylor 7 Way Test Strips bottle contain 50 strips and test for Free Chlorine, Total Chlorine Bromine, pH, Alkalinity, Hardness, CYA with mobile app. Tests for Total Alkalinity: 0, 40, 80, 120, 180, 240 ppm total alkalinity as CaCO3. Other tests are listed below. Tests for Total Bromine: 0, 1, 2, 4, 10, 20 ppm bromine (Br2). Tests for Total Chlorine: 0, 0. 5, 1, 2, 5, 10 ppm chlorine (Cl2). Tests for Free Chlorine: 0, 1, 2, 3, 5, 10 ppm chlorine