Bluetooth compatibility for the 6 in 1 meter: driven by a mobile app, it professionally measures pH, ORP, chlorine, EC, TDS and temperature. It is suitable for home drinking water, hydroponics, laboratories and aquariums.Highly accurate water quality tester: The high precision algorithmic chip and electrodes of our digital water quality tester guarantee accurate and fast response. The green backlit LCD design ensures that measurements can be read under all conditions.High protection rating: The IP67 waterproof rating allows this product to be used properly in water and can provide a long service life. Good performance and long service life.Comprehensive information display: Simply immerse the pH meter electrode in the solution to be measured and the reading is quickly displayed on the APP. Multiple parameters are displayed simultaneously and the mobile app controls the backlit display.Synchronised data display: Simply immerse the electrode in the solution to be measured and the data is synchronised to the mobile app, with multiple data displayed simultaneously for convenience. It is not necessary to operate the water pen frequently to view the data.