The Non Addressable Type works with 2 Pins Water Leak Sensing Cable A-LC1B.
When water comes into the sensor cable, the leak module A-LC1A would alert and send RS485 or Relay output. The relay could be an external Alarm ( the sensor comes with audio alarm itself around 30db)
The RS485 output is Standard MODBUS RTU PROTOCOL, which you can program it with your gateway or other monitoring system.