5 in 1 Professional Multi-parameter Combo Testing Meter PH/EC/TDS/Salinity/Thermometer Digital Multi-Function Tester Water Quality Tester

OverviewPH:1 point (6.86) or 2 point (6.86 4.00) (6.86 9.18) or 3 point (6.86 4.00 9.18) can automatically identify the calibration solution. This is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket. 5 minutes no operation, the meter will automatically shut down. Save power, extend battery life. (Battery is not included). With backlight function, it is more convenient to read