This is way better than the Firestick in my opinion. You can link up Apple speakers and Sonos speakers (I have one of each synced to my AppleTV 4K), and cast anything from your phone to the tv. You can buy a mount to stick it to the back of your tv also if you have your tv mounted on the wall like we do.
Sonos - Move Smart Portable Wi-Fi and Bluetooth Speaker with Alexa and Google Assistant - Black
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Apple - HomePod mini - Space Gray
(5,189)