Allinone smart meter with mobile app control: measures pH, EC, TDS and temperature with professional accuracy. The smartphone app provides a fullscreen display of multiple parameters, allows backlight control, and stores calibration history. Suitable for drinking water, aquariums, fish tanks, swimming pools, farmland irrigation, and laboratory use. Cloudbased data management: realtime data transmission, synchronized saving and data records, easy data sharing and export to Excel, calibration records viewable in the app. Automatic calibration tester: sensitivity replaceable probe, easy operation, automatic pH calibration with twopoint calibration options. Multifunctional meter with automatic temperature compensation: ATC reduces temperature effects; measurement range 0.0 to 60.0 C; ensures reliable readings in any environment. Compatibility and use: works with iOS and Android devices via a dedicated app; compact handheld design with replaceable probe for extended life. Use scenarios: Home drinking water and hydroponics monitoring Aquarium and fish tank care Pool maintenance, irrigation, and basic laboratory testing