SilverCrest Smart Audio

Smart Audio allows you to add multiple speakers to a multi-room zone to play music in sync around the house; or have your speakers play different music, and control all of them from the same app. Set the volume of the group or individual devices, play/pause, browse content in your DLNA compatible music libraries, and play internet radio stations from the built-in portal featuring over 20,000 stations and podcasts, all from within one app.
Smart Audio is also compatible with Spotify Connect so you can play your music directly from your Spotify app into your group of speakers.
Other supported audio sources include line input, DAB, FM radio, Bluetooth. The sources displayed in Smart Audio will depend on the functionality enabled in your audio device.