The Motorola PMMN4125B Remote Speaker Microphone for SL300 & SL3500e (RM250) is a professional-grade speaker microphone built for demanding two-way radio environments. Highlights include iP67 Rated and integrated 22-Hour Battery.
Key Features
- 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
| 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 |
| SL300 | Motorola MOTOTRBO SL Series |
| SL500, SL500E | Motorola MOTOTRBO SL Series |
| SL1600, SL1M | Motorola MOTOTRBO SL Series |
Compatibility: engineered to work with PMMN4125B, SL1600, SL1M, SL2600, SL2M, SL300 and other compatible radio models.
Browse the full speaker mics collection for more compatible options. Order online for fast wholesale shipping, or request a bulk quote for volume pricing on large fleet orders.
