https://preppcomm.com/ https://preppcomm.com/ Company local to me makes these. I haven't tried one but it looks interesting. I did some rework on a couple of

https://preppcomm.com/ https://preppcomm.com/ Company local to me makes these. I haven't tried one but it looks interesting. I did some rework on a couple of their prototype boards. edit: TLDR; it is a morse code transceiver