Amazon Fire TV Cube can now send and receive Alexa Announcements and adjust TV volume by specific increments | AFTVnews
アマゾン「Alexa」の「Announcements」機能、家の中の「Echo」端末に一斉通知--米で開始 - CNET Japan
Alexa Developers - [Announcement] Amazon Common Software for Devices (preview) accelerates integration of Amazon Device SDKs on your devices. Learn more: https://amzn.to/2Tjt1s2 | Facebook
Alexa & Echo: Are Calls and Messages Free? - Smart Home Point
How to use Alexa Drop In, Announcements and Calling on your Amazon Echo speaker