1) This 6-in-1 WIFI PH/EC/TDS/salt/SG/Temperature controller and monitor simultaneously measures and displays both pH value and data of EC/TDS/salt/s. G./Temperature, mode switchable 2)2 comes with 2 BNC electrodes (one for pH and one for EC TDS salt SG), 1 temperature probe, and 1 output power socket. Both electrodes are detachable, easy to replace at any time. 3)As for therelay output power sockets, you can plug your own 110V/ 220V device into it. You can choose EU or US plug sockets . 4) the devicecan be connected to WiFi, download Tuya smart APP, and display the current data and historical data on the mobile phone, abnormalhigh and low data alarm, etc. 5) drinking water, swimming pool, pond, aquariums, hydroponics, laboratory, food processing, etc. It can be used in a wide range of applications,