Motorola PMMN4128A RM780 Remote Speaker Microphone R7 ION MOTOTRBO
Motorola PMMN4128A Remote Speaker Microphone RM780. Motorola PMMN4128A (RM780). The Motorola PMNN4128A (also know as RM780) large RSM provides 102 Phon loudness with a windporting microphone. RM780 is IP68 rated, Work-When-Wet and UL approved.