This is the remote speaker microphone for the later models of the Anytone D578 mobile radios. It will control the radio over a Bluetooth link or through a wired connection.
I had this one on order for almost 3 months. Due to chip shortages that's how long it took to get it. Now I have to update the firmware in the radio and load up a test code plug. Most of the settings are imported from the hand held D878 radio so that saved a HUGE amount of time building a code plug from scratch. These ra