Vertex Standard VX-454 Ruggedized IP67 Public Safety Speaker Mic.
Bluetooth Speaker Mic w/ Volume Knob & Adapter For Vertex: VXD-970, VX – Comm Gear Supply
Speaker Mic Microphone for Vertex Standard VX-231/140/180/210/210A/231/246 Radio | eBay
Vertex MH-50C7A Remote Speaker Microphone with Toggle Switch - HiTech Wireless Store - Business Two Way Radio
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