PMMN4125 RM250 Remote Speaker Microphone with 3.5mm Connector for SL & TLK Series
Built-In Battery • 22+ Hour Runtime • IP67 Rated • Windporting • 3.5mm Audio Jack
The PMMN4125 RM250 Remote Speaker Microphone is Motorola Solutions’ first wired RSM with a built-in battery, engineered specifically for MOTOTRBO™ SL Series and WAVE TLK 100 radios. With over 22 hours of battery life, IP67 sealing, and Windporting technology, the RM250 keeps your transmissions clear and your hands free across demanding shifts — a rugged, professional upgrade for any compatible business two-way radio.
Who It’s For
The PMMN4125 RM250 is the right accessory if you run MOTOTRBO SL Series portables or WAVE TLK 100 push-to-talk devices and need clear, hands-free audio in noisy or wet conditions. Not sure if it fits your fleet? Browse our full range of commercial two-way radios or contact our Canadian radio experts.
Key Features
Built-In Battery
Motorola’s first wired RSM with its own battery, delivering over 22 hours of runtime so you focus on the job instead of recharging.
Windporting Technology
Eliminates the whining and howling of wind across the mic while keeping water out of the port, resulting in clearer transmissions in harsh weather.
IP67 Sealed
Built to survive — rated IP67 to withstand immersion for 30 minutes and remain completely dust-tight on tough job sites.
3.5mm Audio Jack
A 3.5 mm audio jack lets you connect a receive-only earpiece for discreet, low-profile communication.
Compatible Radios
The PMMN4125 RM250 Remote Speaker Microphone is designed for Motorola MOTOTRBO SL Series radios and WAVE TLK 100 push-to-talk devices using the 3.5mm connector interface. If you operate an SL Series or TLK fleet and want to confirm the RM250 is the correct fit for your exact model and firmware, reach out before you order.
Not certain which speaker mic matches your radios? Explore the full commercial two-way radio and business radio lineup, or contact us and our Canadian team will confirm compatibility for your fleet.
Frequently Asked Questions About the PMMN4125 RM250 Remote Speaker Microphone
• Which radios is the PMMN4125 RM250 compatible with?
The PMMN4125 RM250 Remote Speaker Microphone is built for Motorola MOTOTRBO SL Series radios and WAVE TLK 100 devices that use the 3.5mm connector interface. If you want to confirm the fit for your specific model, contact our team before ordering.
• Why does the RM250 have a built-in battery?
The RM250 is Motorola Solutions’ first wired remote speaker microphone with its own built-in battery, which provides over 22 hours of runtime so your team can stay connected through long shifts without stopping to recharge the accessory.
• Is the PMMN4125 RM250 waterproof?
Yes. The RM250 is rated IP67, meaning it can withstand immersion in water for up to 30 minutes and is completely dust-tight, making it suitable for wet, dusty, and demanding work environments.
• What is Windporting on the RM250?
Windporting is a Motorola technology that eliminates the whining and howling sounds of wind blowing across the microphone while preventing water from clogging the mic port, resulting in clearer transmissions in difficult weather.
• Can I use an earpiece with the PMMN4125 RM250?
Yes. The RM250 features a 3.5 mm audio jack that lets you connect a receive-only earpiece for discreet communication, ideal for retail, security, and customer-facing environments.
