All Wi-Fi transmitters that are within a wifi blocker (BLWF) can not transmit to other wifi outside BLWF.
It works to create many machines that use wifi in a single project.
And there are 2 types of blockers. 1-blockers frequency may change by the temperature (like placing the frequency of WiFi transmitters) to block the same frequency as the WIFI. 2-this blocker blocks all frequencies.