Description
Motorola PMMN4021A Intrinsically Safe Remote Speaker Microphone
FM-approved intrinsically safe RSM with windporting technology and 3.5mm audio jack. For use in hazardous locations with flammable gases or vapors.
The Motorola PMMN4021A is a rugged, intrinsically safe remote speaker microphone designed for clear communication in challenging and hazardous environments. Windporting technology significantly reduces background noise from wind, machinery, and crowds, while the FM-approved intrinsically safe rating makes it suitable for locations where flammable gases or vapors may be present. A 3.5mm audio jack allows connection of a listen-only earpiece for discreet communication.
Key Features & Benefits
Windporting Technology: Reduces background noise from wind, machinery, and high-ambient-noise environments for clearer audio transmission.
Intrinsically Safe (FM Approved): Rated for use in hazardous locations where flammable gases or vapors may be present.
3.5mm Audio Jack: Connects a listen-only earpiece for discreet communication.
Rugged Construction: Built to withstand tough conditions and daily professional use.
Specifications
| Attribute |
Details |
| Brand |
Motorola |
| Model / SKU |
PMMN4021A |
| Product Type |
Remote Speaker Microphone (RSM) |
| Safety Rating |
Intrinsically Safe (FM Approved) |
| Noise Reduction |
Windporting Technology |
| Audio Jack |
3.5mm (Listen-Only Earpiece) |
| Country of Origin |
Malaysia |
Compatibility
| Model |
Series |
| HT750, HT1250, HT1550 |
Motorola HT Series Portables |
| MTX850, MTX950, MTX9250 |
Motorola MTX Series Portables |
| PR860 |
Motorola PR Series Portables |
| PRO5150 |
Motorola PRO Series Portables |
Frequently Asked Questions
What does “intrinsically safe” mean for this microphone?
Intrinsically safe (IS) means the PMMN4021A is designed and FM-approved to operate safely in hazardous locations where flammable gases, vapors, or combustible dust may be present. The electrical energy within the device is limited to levels that cannot ignite a hazardous atmosphere under normal or fault conditions.
What is windporting technology?
Windporting is Motorola’s noise-reduction design that uses a ported microphone housing to significantly reduce the pickup of wind noise and high-ambient background noise. This results in clearer voice transmission in outdoor or high-noise environments such as construction sites, refineries, and outdoor events.
Can I connect an earpiece to the PMMN4021A?
Yes. The PMMN4021A includes a 3.5mm audio jack that accepts a standard listen-only earpiece for discreet audio monitoring while keeping the RSM clipped to your shoulder or lapel.
Warranty
1-year manufacturer’s warranty.
