I use and see others use smart watch triggered from time to time. Occasionally I see people use Bluetooth headphone triggers. Believe it or not a lot of use is

I use and see others use smart watch triggered from time to time. Occasionally I see people use Bluetooth headphone triggers. Believe it or not a lot of use is out of the public eye, though. Lots of usage is in cars (where there has been a sharp shift to phone powered interfaces), and as an assistive tech. They are great for breastfeeding moms as an example.