https://www.cnbc.com/2017/09/20/amazon-working-on-first-wearables-to-interact-with-alexa.html

Amazon is working on its first wearable device: a pair of "smart glasses" that would allow its virtual assistant Alexa to be summoned any time, anywhere, according to people familiar with its plans.

The device, which would tether wirelessly to a smartphone, is designed to look like a regular pair of spectacles so that it could be worn comfortably and unobtrusively, the people said. A bone-conduction audio system would allow the wearer to hear Alexa without having to insert headphones into their ears.