The Motorola Remote Speaker Mic PMMN4075 is engineered for clear communication in demanding environments. With an IP57 rating, it is fully dustproof and water-resistant, capable of immersion for up to 30 minutes. Enhanced noise reduction technology and Windporting eliminate wind noise and block water, ensuring superior audio clarity. This RSM features a compact housing and complies with UL-TIA4950 intrinsic safety standards, making it ideal for hazardous conditions. Compatible exclusively with MOTOTRBO radios, including the DP3441 and DP3661 series, it’s a rugged, reliable communication tool for professionals in harsh settings.