I use an old iPhone with coupled with a wired 3.5mm jack lavalier mic that I tape to my chest beneath my shirt, and use the Speech jammer app on iOS. I turn it on, put the phone on my pocket, and take Bluetooth buds (Earin A3) out of my pocket when I need to speak a lot. They automatically turn on and the DAF starts, no need to grab my iPhone, just put the buds in my ears. And the quality of the sound is really great.