Vertex MH-37A4B RX/TX Light Duty Ear Piece for Yaesu Plugs into the MIC/EAR jack on selected models for Yaesu/Vertex. Lapel clip on the microphone/switch. Allows convenient operation while the transceiver is worn. Discreet and comfortable control. Compatible with FT-60R, FT-250R, VX-8GR, VX-3R, VX-150, VX-5R, VX-2R, VX-160, VX-230, VX-350, VX-410, VX-420, VX-420A.