This hand mike is compatible with all versions of the AT-D578UV and is made by AnyTone and is the same microphone that comes with the radio.
This microphone has special keys for the functioning of the radio as well as a 16 key keypad for generating the full set of DTMF codes.
Specifications
Connector: RJ45
Type: Microphone only
Backlit: No
DTMF Keys:Yes