Tests for 3 important parameters in seconds: Total Bromine/Chlorine, pH, Total Alkalinity. Spend more time relaxing not guessing with AquaChek® TruTest Spa® automated color matching! Follow the instruction guide, dip a strip, place on the digital test strip reader, and it does the work for you–no color matching! Numerical results displayed along with “low”, “ok”, and “high” indicators. The meter is fully automated and includes an automatic countdown timer with color-matching controls that provide a fast and easy way to test spa water chemistry. Tests for: Total Bromine/Chlorine, pH, Total Alkalinity.