The Bang & Olufsen app supports fully set-up and multiroom content control:
Beosound Essence 2nd Gen,
Beoplay A9 2nd Gen,
Beovision Avant NG,
BeoSound Essence 1st Gen for Deezer and TuneIn content.
Some older Bang & Olufsen devices will be limited to set-up and configuration in the Bang & Olufsen app. These are the Beoplay A8, the Playmaker, the Beoplay A9 1st Gen, the BeoLit 12.
The Bang & Olufsen app will support using TVs as a multiroom speaker. This applies to Beovision Avant, Beovision 11, Beoplay V1, Beosystem 4 (those TVs which are running VE.1x).