You control what apps can notify you and how
Send messages throughout your home
Automatically enables when home and disables when you leave
Quickly use intercom from notification tray
Only broadcast to the rooms you choose
Customize broadcast with custom tones and voices
Only Sonos speakers. Contact your speaker manufacturer if you'd like your speaker to be supported as well.
Yes as long as the original source was started from Sonos app.
It's on the way...Spring 2018