Features Display and buttons digital display on the body clear images and easy operation panel Electrode probe high precision sensitive electrode probe has fast response accurate data and more stable measurement One piece of automatic calibration automatic calibration temperature compensation the operation is more simple long press the CAL key for 3 seconds automatically identify the calibration solution Battery compartment 4 button batteries replacement is more convenient Specification Type Portable PH meterAccuracy 0 1Probe Type External Connection ElectrodesTest range PH 0 1 14 0PH Temperature 0 50 C 32 122 FResolution PH 0 1PH Temperature 0 1C 1FAccuracy PH 0 1PH Temperature 1C 2FPH calibration PH 25 C three point calibration 4 0 6 9 9 2Electrode p external connection batteryWorking temperature 0 50 C 32 122 F Power supply 1 5V battery 4PSC Not included Package included 1 x PH Tester Details pictures