Assertion: echo's microphone | /r/HasProperty | built-in
Facets:
Source sentences:
text: The Amazon Echo and the Google Home are both always listening, via their built-in microphones that can hear voice input from a moderate distance.
text: With seven built-in microphones, the Echo is designed to hear your voice commands no matter where you are in the room, even if there’s background noise or there’s music playing.