Motorola and Lenovo have announced the new 'Smart Speaker with Amazon Alexa' Moto Mod, which adds additional microphones, speakers, and a battery in addition to having Alexa always listening.
https://www.notebookcheck.net/The-Amazon-Alexa-Moto-Mod-attaches-Alexa-to-the-back-of-your-phone-so-she-is-always-with-you.262582.0.html
So on top of Google listening to you, now you can have Amazon as well for only $150. It's a bargain!!
Just install Cortana too and go for the trifecta