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.
RELM 2-pin (side) connector which is the same as very popular Motorola 2-pin and fits many radio models including: RPU6500 and RPV6500
Motorola most popular 2-pin (side) includes: CLS, CP, GP, HT, MTX, PRO seies and includes DIGITAL models. Not compatible with CP100d models.