New High Quality Standard Horizon Submersible Speaker Mic f/HX750, HX760 & HX850 Submersible Yaesu Vertex Standard Brand SpeakerMike MH-73A4B. Fits Models VX-6R, FT-270R, VX-170, VXA-200, FT-277R, VX-7R, VX-177, HX-471S, HX-460S, HX-500S, HX-750, HX-760, HX-850. Fits All models that use Optional VC-27, CMP-460 & Mh-57A4B mics. * Genuine Yaesu Standard Brand Waterproof Item, No Generic Substitutes!