It does support both actually. Apple Watch supports Bluetooth Headsets [2] and untethered music playback using the 2GB internal memory [1]. [1] http://m.imore.

It does support both actually. Apple Watch supports Bluetooth Headsets [2] and untethered music playback using the 2GB internal memory [1]. [1] http://m.imore.com/how-add-apple-music-playlists-your-apple-watch http://m.imore.com/how-add-apple-music-playlists-your-apple-... [2] https://support.apple.com/en-us/HT204218 https://support.apple.com/en-us/HT204218