PMMN4051B Remote Speaker Microphone, equipped with a 3.5mm audio jack, designed to withstand IP54 conditions. Its standout Windporting feature significantly reduces wind and severe weather-related background noise, ensuring crystal clear communication. This microphone's unique design allows audio to transmit even when water blocks the port. Ideal for public safety professionals seeking increased confidence in their tools. This convenient RSM offers the ability to speak and listen without needing to remove the radio from your belt or case. It's fully compatible with Motorola Solutions XTS Radio Series.