... meter, all in one, pH electrode is included, easy to use* Data hold function for freezing the desired value* Water proof and ... Build in temperature sensor, ATC (auto temperature compensation)*Available for wide applications, such as aquarium, beverage, fish hatcheries, ... SpecificationsParametersMeasurement RangepH0.00 ~ 14.00 pH.Temp.0 to 50oC ( 32 to 122oF ).AccuracypH± 0.02 pH * After calibration ...