talkiepi is a headless capable Mumble client written in Go, written for walkie talkie style communication on the Raspberry Pi.
The hardware is based around a Raspberry Pi Zero and SeeedStudio ReSpeaker 2-mic Pi HAT. A full bill of materials with links to suppliers will be added shortly.
3D printable enclosure
The case was designed by Paul Van Gaans - PrintVeryGood.com. The geometry files are available in the stl directory.
3D wall mount adapter
I have put together an install guide here.