Sorry if I missed that. All of B&O's audio products have been part of BeoLink Multiroom for some time. I have some products that go back to 2015 that are compatible. I personally have a mix of stand-alone speakers like the BeoSound 1, BeoSound 2, BeoSound 35, BeoSound Level, and then room kits like the Essence MKII (the older room kit) and the BeoSound Core (the newer room kit). I have my eye on the new A5
They all have AirPlay 2 so you can use them that way as well, but their internal multiroom system is much more stable. I just love the fact that I can touch the top of each speaker or a wall control to join or drop rooms.