OBSERVER™ LIGHTWEIGHT REMOTE SPEAKER MICROPHONE. Smaller size more convenient for users who want the features of a speaker mic but in a smaller size. Speaker output of a much bigger mic and also has a 3.5mm jack for optional earphone.
Fits Vertex and Yaesu radios with 1-pin, SCREW-IN connector including: VX-120, VX-127, VX-170, VX-177, VX-6R, and VX-7R.