Detailed Product Description Waterproof Pocket pH Meter FEATURESTwo-point push-button auto calibration.Measured data locking by pushing HOLD button.Automatic temperature compensation.Replaceable electrode.Auto power-off.Excellent water-proof effect. SPECIFICATIONSItem No: PHPEN20pH Range: 0.0~14.0pHAccuracy: ±0.1pH Resolution:0.1pHTemperature Range:---Temperature Accuracy:---Calibration Points: 2 ...