Speaker Mic with Reinforced Cable for Motorola Vertex Radios VX-210 VX-410 VX-231 VX-261 VX-264 VX-351 VX-354 VX-451 VX-454 VX-459 EVX-531 EVX-534 539, 3.5mm Audio Jack, Heavy Duty Shoulder Microphone - Newegg.com
Yaesu Shoulder Microphone for Vertex Standard VX-261 VX-230 VX-231 VX-298 VX-350 Radios - Two-Way Radio
Vertex Standard VX-264 Ruggedized Waterproof IP68 High Volume Speaker Mic
Remote Speaker Microphone For Vertex [EVX-S24] | Two Way Direct
Amazon.com: VX-231 VX-261 Radio Speaker Mic Compatible for Motorola Vertex Standard VX-261 VX-264 VX-231 VX-451 VX-454 VX-459 Walkie Talkie Duty Shoulder Microphone MH-450s MH-360S with 3.5mm Audio Jack : Electronics