I believe you can use them as regular Bluetooth headphones, but you can't enjoy ...

hbosch on Dec 11, 2020 | parent | context | favorite | on: Heavy is the Head that wears the AirPods Max

I believe you can use them as regular Bluetooth headphones, but you can't enjoy the spatial audio. That's my understanding. As with standard AirPods, the philosophy is "better together" with Apple products but, they are not exclusive.