1.Comprehensive Water Analysis: This water quality tester allows you to measure the pH level, total dissolved solids, ORP, EC, temperature, and chlorine in the tested water, providing you with a thorough understanding of its quality. 2.Remote Monitoring via Mobile App: Once connected to your smartphone via BT, all test results from the water quality test meter can be conveniently viewed on the app, allowing you to monitor the water quality from a distance. 3.Backlit LCD Display: 4.Waterproof Design: 5.Customizable Alerts: Specification: Origin: Mainland China Size: 160.00x90.00x26.00mm/6.3x3.54x1.02inch Power supply: 3*AAA (not included) PH: Range: 0.1-14.0pH Resolution: 0.1pH Accuracy: ±0.1pH CL: Range: 0.1-4.0mg/L Resolution: 0.1mg/L Total dissolved solids: Range: 0-999ppm, 1000-9990ppm Resolution: 1ppm, 10ppm Accuracy: ±2%FS ORP: Range: -999+999mV Resolution: 1mV Accuracy: 15mV Temperature: Range: 0.1& 8451;-80& 8451;, 32.1& 8457;-176.0& 8457; Resolution: 0.1& 8451; Accuracy: ±0.5& 8451; Calibration: pH: 6.8/4.0/9.2 or 7.0/4.0/1.0 ORP: 256mV ATC temperature: 0.1& 8451;-60& 8451; Environment: 0.1& 8451;-80& 8451;, RH: max 90% Total dissolved solids factor: 0.1-3.0 (default 0.5) EC temperature compensation: 0.1-3.0 %/& 8451; (default 2.0 %/C) BT: Version 5.2 Waterproof: IP67 Data storage: can store the latest 1000 data records