The Motorola PMMN4099 IMPRES Remote Speaker Microphone (RSM) is designed for MOTOTRBO digital two-way radios. This RSM uses innovative Windporting technology that suppresses background noise and IMPRES intelligent audio to provide optimal audio performance and improved gain capability. In howling winds, driving rain and severe weather, Windporting technology helps you communicate effectively and hear clearly. It also prevents water from clogging the microphone, resulting in clearer transmissions and with a 3.5mm audio jack, this RSM also offers discreet delivery of messages and greater operational flexibility by having the messages straight to your ear.
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