Handheld Multiparameter Meter, pH Range -2 to 19.99, Electric Conductivity Range 0 to 199.9 mS, TDS Range 0 to 100 g/L, ORP Range -1999 to 1999mV, Dissolved Oxygen Range 0 to 200 Percent, Oxygen Concentration 0 to 40 mg/L, Waterproof Yes, Automatic...