Yaesu Vertex Submersible Speaker Mic #  MH-73A4B
Submersible Speaker MicStandard Horizon's Submersible Speaker Mic specifically for all current handhelds except HX270/280/370SAS. Product : STANDARD SUBMERSIBLE SPEAKER MIC FOR 750/760/850 Manufacturer : STANDARD PARTS Manufacturer Part No : MH-73A4B UPC : 788026111534