Description
Motorola PMMN4125B (RM250) Remote Speaker Microphone
IP67-rated wired RSM with integrated 22-hour battery and windporting microphone. For MOTOTRBO SL and TLK series portables. Replaces PMMN4125A and PMMN4125.
The Motorola PMMN4125B (RM250) is an IP67-rated wired Remote Speaker Microphone (RSM) for slim-profile MOTOTRBO SL and TLK series portable radios. It features an integrated battery providing up to 22 hours of life on a standard 5/5/90 duty cycle with a typical 2-hour charge time, and a windporting microphone that suppresses background noise for clear transmission in adverse conditions. A 3.5mm non-threaded audio jack supports a receive-only earpiece for discreet communication. The PMMN4125B is the updated version of the PMMN4125A and PMMN4125.
Key Features & Benefits
IP67 Rated: Fully dust-tight and submersible — reliable in heavy rain, wet industrial, and maritime environments.
Integrated 22-Hour Battery: Built-in high-capacity battery supports multi-shift usage without needing to charge the radio itself.
Windporting Microphone: Suppresses ambient wind and background noise for clear voice transmission in adverse field conditions.
3.5mm Non-Threaded Audio Jack: Connects a receive-only earpiece for discreet monitoring.
USB-A to Micro-USB Charging Cable Included: Ships ready for use with a charging cable for the integrated battery.
Broad SL and TLK Series Compatibility: Works with SL300, SL3500e, SL7550e, TLK100, TLK110, and additional MOTOTRBO slim portables.
Specifications
| Attribute |
Details |
| Brand |
Motorola Solutions |
| Model / SKU |
PMMN4125B |
| Also Known As |
RM250 |
| Replaces |
PMMN4125A, PMMN4125 |
| Type |
Wired Remote Speaker Microphone (RSM) |
| Ingress Protection |
IP67 (Dust-Tight, Submersible) |
| Battery Life |
Up to 22 hours (5/5/90 duty cycle) |
| Charge Time |
~2 hours |
| Audio Jack |
3.5mm Non-Threaded |
| Includes |
USB-A to Micro-USB Charging Cable |
| Country of Origin |
Malaysia |
Compatibility
| Model |
Series |
| SL300 |
Motorola MOTOTRBO SL Series |
| SL500, SL500E |
Motorola MOTOTRBO SL Series |
| SL1600, SL1M |
Motorola MOTOTRBO SL Series |
| SL2600, SL2M |
Motorola MOTOTRBO SL Series |
| SL3500e |
Motorola MOTOTRBO SL Series |
| SL4000e, SL4010e |
Motorola MOTOTRBO SL Series |
| SL7550, SL7550e, SL7550E |
Motorola MOTOTRBO SL Series |
| SL7580, SL7580E |
Motorola MOTOTRBO SL Series |
| SL7590, SL7590E |
Motorola MOTOTRBO SL Series |
| TLK100, TLK100i, TLK110 |
Motorola TLK Series |
| EVOLVE |
Motorola EVOLVE Series |
Warranty
1-year manufacturer’s warranty.
