Temperature measurementYou can measure water temperature with the DS18B20 waterproof temperature sensor. Preset a temperature range on the app, when the temperature reaches the preset range, TH Elite WiFi connected switch can turn on/off automatically. 16A Max & Dry Contact OutputSupport to connect a 16A Max high load, dry contact output. Temperature/Humidity History Query In addition to viewing the real-time temperature on the LCD screen. It also supports historical "temperature/humidity" data display by hour, day and month. Historical data for the past 6 months can be exported in .xlsx format with hourly accuracy. Local Automatic ControlSupport LAN control, automatic control is more reliable. You can set 8 automatic control schedules for you to save electricity bills and create a comfortable environment. Voice Control and QueryTH Elite WiFi Light Switch is compatible with Alexa, Google Assistant , you can query the temperature and humidity values by your voice. Note: THS01 and DS18B20 (RJ11) are the sensors of the RJ11 socket, just plug them into TH Elite to use .