Titan Brand- Handheld Speaker MIC Microphone for YAESU VERTEX Radios 1 Pin 3.5mm Titan Brand Speaker Microphone for Vertex 18 Month Warranty Water-proof (IP67) enquiry acceptable for fire-fighting Dep., sea patrolman/patrolwoman, army etc. Removable PTT button offers you cleaning the dusty easily. High quality louder speaker and microphone units provide clear audio communication.