https://www.techradar.com/news/roku-tv-wireless-speakers-seamlessly-sync-to-your-tv-for-stereo-sound

When Roku quietly acquired a Denmark-based multi-room audio startup called Dynastrom in late 2017, it didn’t announce what, exactly, Roku - a patently TV-focused company - needed a bunch of audio engineers for. 

Today, those plans have become abundantly clear: Roku has designed a pair of wireless TV speakers that will leverage Dynastrom tech to connect seamlessly to any Roku TV.