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 Standard radios with Multi-pin connector including: VX-P821, VX-P824, VX-P829, VX-P870 Series, VX-P921, VX-P924, VX-P929, VX-P970 Series (all P25 radios), and VXD-720 Digital DMR models.