Nowadays, users install one router in 2-3 storied building. And the router is connected on the second one, so that the device reach can be divided into three floors. But it cannot provide signals into the three floors, you will get the signals on the second floor but on others the signals will be very weak. https://mywi-fiext.net/can-i-connect-two-ac2200-wifi-mesh-extenders-ex7300/