The ColorQ 2X PRO 7 Photometer reads Seven (7) Pool and Spa Test Factors: Free Chlorine, Total Chlorine, Bromine, pH, Alkalinity, Calcium Hardness and Cyanuric Acid. Includes enough reagent tablets to perform 100 each of the Total Alkalinity, Calcium Hardness and Cyanuric Acid tests and liquid reagents (30 ml bottles) to perform 144 of each of the other tests. Shelf life has been improved, through the use of tablets, for the total alkalinity and calcium hardness tests. A new test tube design and push-through foil packaging makes tablet use easier and faster. There is nothing else to buy, as all of the required supplies are provided. Includes trilingual directions and photo-diagrammatic instructions. Waterproof, Bluetooth capable and comes with a 1-year factory warranty.