DWM-SA818 walkie talkie /tytera radios /trunking radio module
Portable Radio Interface for Ham Allstar UHF Frequency Range Module for RPi2 RPi3 RPi4, Embedded SA818 Module, Wide Application : Amazon.ca: Electronics
SA818S Walkie talkie module with RDA1846S chip from NiceRF on Tindie
Iowa City Amateur Radio Club
High-integrated Embedded walkie talkie module from NiceRF on Tindie