A：
The maximum open distance between the smoke alarm is 200 meters, the distance between the partition walls is affected by different wall thicknesses and materials. In our laboratory tests, there is 30 meters behind 4 walls.
The maximum open distance between the smoke alarm is 200 meters, the distance between the partition walls is affected by different wall thicknesses and materials. In our laboratory tests, there is 30 meters behind 4 walls.