Another great feature is that the ball has a motion sensor which triggers phrases and sounds. (intelligentmother.com)
If you take a second and look at how broad match works, then you will realize that a broad match will trigger phrase match as well as exact match. (woorkup.com)
You can train the app to recognize your voice and use a custom trigger phrase for voice commands if you're tired of barking «okay, Google» at your phone. (9to5google.com)