>For voice integration, you can just provide a bluetooth microphone on you device and have it access Siri. Garmin have tried the same strategy on some of their watches.
If your watch does not support Bluetooth Classic with the headset profile then you can't pretend to be a mic. So watches with Bluetooth LE only can not utilize Siri.
Interesting. This indicates that the inability for my Amazfit Balance to do this is indeed an artificial limitation, and not something that Apple prevents. <https://np.reddit.com/r/amazfit/comments/1j3ftbr/why_cant_ba...>