RESPONDER series with QD® QUICK-DISCONNECT Lapel Microphone w/Soft Ear-Hook Earphone. Our most popular model is light, versatile and rugged.
Fits older Vertex radios with multi-pin connector (note: NOT compatible with VX-537 or NYPD models) including: VX-310, VX-500, VX-510, VX-520, and VX-520UD.
