The basic “what’s this” can be found in the Vendor Description. I bought it n Amazon.
This allows me to provide different SSIDs with different VLANs. I.e. my smart home devices (the couple on 802.11 I got) can be mapped to a different VLAN than the home devices. Also my work laptop can be mapped to the work VLAN.
I’m running it with the Omada Controller.