The 9-in-1 DO700 kit measures DO concentration/saturation, pH value, mV, temperature, conductivity, TDS, salinity, and resistance. It features automatic salinity compensation and manual air pressure compensation for DO measurements. Additionally, it offers automatic one-button calibration for pH values of 4, 7, and 10, with an option for three-point calibrations for improved accuracy and automatic temperature compensation. Complete with a DO probe, pH/mV/Temp electrode, polymer conductivity cell, pH and conductivity calibration solutions, batteries, and a hard case.