Fire TV Cube (1st Gen) was the first Fire TV device offering a hands-free TV experience (far-field control) — you can use your voice to access, launch, and control content, turn on your TV and AV devices, switch inputs, adjust the volume, play music, and more, without a remote or without pairing an Echo device with your Fire TV. When your TV is off, Fire TV Cube acts like an Amazon Echo …

https://developer.amazon.com/docs/fire-tv/device-specifications-fire-tv-cube.html