2-WIRE SURVEILLANCE STYLE Lapel Microphone w/Twist Connect Acoustic Tube Earphone with Bud. Unique design with belt-mounted PTT. Also includes semi-custom Ear Mold.
Fits older Vertex radios with multi-pin connector (note: NOT compatible with VX-537 or NYPD models) including: VX-310, VX-520, VX-520UD, VX-600, VX-800, VX-900.
