What does Mist's patented 16-element vBLE Antenna Array do when "engagement" is enabled?

[Reference: https://www.mist.com/resources/ap61-access-point/, According to the Mist AP43 Access Point Data Sheet document, Mist’s patented 16-element vBLE Antenna Array transmits unique and directional BLE beams when “engagement” is enabled. This feature allows for personalized location-based services such as wayfinding, proximity messaging, and asset tracking., References: https://www.mist.com/wp-content/uploads/Mist-AP43-Data-Sheet.pdf, , ]