This Motorola Remote Speaker Microphone (RSM) comes with a Volume Toggle Switch and Emergency Button for easy operation. The 3.5 mm audio jack allows you to connect a receive-only earpiece for private communication.
PMMN4099B features IMPRES technology providing superior audio by suppressing ambient noise, improving voice intelligibility and amplifying quiet transmissions.
It also has a TIA 4950 Div 1 and 2 intrinsically safe rating when used with radios with the same rating.
IP68 submersibility rating (2 meters for 2 hours).










