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Category Archives: APX Radios
Motorola Wireless Surveillance Bundle Promotion for APX/SRX Radios
This bundle is designed for first responders with Motorola APX and SRX 2200’s looking for wireless earpiece accessories. Law enforcement, police, military, and security personnel who want to eliminate wires will benefit from this promotion.
Includes NTN2570, NTN2571, NTN2572, PMLN7052, and NNTN8298
Our MCW23 bundle includes the NTN2571 PTT pod with micro-USB charger, NTN2572 CommPort style earpiece with 12 inch cable, PMLN7052 earpiece with quick-disconnect acoustic tube, and NNTN8298 covert dual earbuds with in-line mic. If you are looking for the popular NTN2570 wireless kit, our bundle provides the same product combination (NTN2571 & NTN2572).
Requires APX and SRX Radios with MCW Bluetooth Enabled
Compatible with Motorola APX 8000, APX 8000XE, APX 7000, APX 7000XE, APX 6000, APX 6000XE, APX 4000, APX 3000, and SRX 2200. The radios require Mission Critical Wireless (MCW) Bluetooth enabled. Check for the icon in the display and if there is an ON/OFF button assigned.
How to Change Language on Motorola Wireless Remote Speaker-Microphones
We frequently receive support requests from Motorola wireless speaker-mic users to change the language from French back to English. This is caused by accidently turning on the WRSM and holding the PTT button at the same time.
The mics affected are the RLN6554 and RLN6544 for APX series radios, RLN6562 for MOTOTRBO XPR/SL series DMR radios, and the RLN6551 long range wireless mic for vehicle applications.
Motorola Wireless Bluetooth Speaker-Mic Language Selection Instructions

Updated Motorola APX XE500 RSM Best Practices Training Video for Firefighters
Below is an updated training video from Motorola Solutions for firefighters using APX series 2-way radios and remote speaker-microphones. The original video “Say It Loud and Clear” was developed with help from the IAFC.
The new version includes the XE500 extreme temperature remote speaker-mics designed for firefighters in addition to the standard RSM’s with Windporting.
Best Practices Video for Clear Audio Using Motorola APX Series
Motorola Technical Notification: APX/PCR RSM Cable Failures
Remote speaker-microphones cables for APX P25 and XPR MOTOTRBO DMR series radios could experience jacket failures when stressed. A manufacturing change in jacket material caused the problem.
When the cord is stressed the cable could tear or fray and expose the internal wiring. As a result, RSM’s that show failures will be replaced for up to 24 months after purchase.
Symptoms and Root Cause of the Cord Failures
The cord failure is shown in the image. The failure typically occurs at the RSM head or radio connector end or both, but can also occur in cable middle section.
Radio users who prefer to route the mic cord behind their back and stress the cable are more likely to experience the problem. Motorola recommends to dress the coil section so it
does not get caught on uniform accessories for optimal RSM service life.
Motorola Remote Speaker-Microphone Models Affected
Motorola is upgrading the cable jacket material in the near future. RSM’s with the new cable will include an “L” in the model suffix when shipped.
Below are the RSM’s identified in the Motorola Technical Notification (MTN):
APX 8000, APX 7000, APX 6000, APX 4000,
PMMN4062
PMMN4065
PMMN4069
PMMN4083
PMMN4099
MOTOTRBO PCR XPR 3000 and XPR 7000 Series RSM’s
PMMN4071
PMMN4073
PMMN4108
PMMN4024
PMMN4040
PMMN4025
PMMN4046
PMMN4050
Only mics that show the failure will be replaced under the MTN warranty extension. Reference MTN-0070-19-NA and original factory order number when requesting replacements. They can be obtained by calling Motorola at 1-800-422-4210; prompt 1.
Download the Motorola Technical Notification MTN-0070-19-NA_RSM
Motorola Wireless Microphone FAQ’s and LED Status Indicators
The Motorola wireless remote speaker-mic (WRSM) is a popular accessory for APX, XTL, and XPR series hand-held and vehicle mounted two-way radios.
Paired with portable radios it provides range about 30 feet and with the PMMN4097 mobile palm mic/gateway you can roam up to 300 feet from the vehicle. There is “mission critical” for APX and a “operations critical” software version for MOTOTRBO DMR radios.
Choose the Correct Wireless Mic for your Motorola Radio
Motorola’s model nomenclature and product tiering make it easy to purchase the wrong mic for your radio. Depending on the included charger bundle the product SKU changes slightly. Below is a summary of the configurations and their compatible radios.
Hand-held APX Series With Internal Bluetooth Enabled
- RLN6554 – Wireless RSM with Battery, Clip (RLN6544) and Dual Unit Charger (PMLN7120)
- RLN6544 – Mission Critical Wireless RSM with Battery and Clip Only
These models are compatible with APX 8000, APX 7000, APX 7000XE, APX 6000, APX 6000XE, APX 4000, APX 3000, and SRX 2200.
It is important to make sure your radio has Bluetooth enabled. The blue dot means is has the internal hardware only. You also need to have the software option (free since April 2016) and your programmer has it turned ON. Notice this same mic can also be used with the PMMN4097 mobile palm mic/gateway.
MOTOTRBO XPR 7000 Series With Bluetooth Enabled
- RLN6562 – Operations Critical Wireless Remote Speaker Microphone with Battery and Belt clip and Dual Unit Charger (PMLN7120)
This model is compatible with XPR 7350, XPR 7350e, XPR 7550, XPR 7550e, XPR 7580, and XPR 7580e with Bluetooth enabled. It may be turned OFF or disabled to save battery life. It is not compatible with XPR 6000 series or with the long range PMMN4097 mobile palm mic/gateway.
Wireless Mic for APX, XTL, and XPR Series Vehicle Mounted Radios
- RLN6551 – Long Range Wireless Mobile Accessory Kit, includes Wireless
Remote Speaker Microphone (RLN6544), Mobile Microphone Bluetooth Gateway (PMMN4097), Vehicular Charger (PMLN6716) - RLN6552 – Same as above without vehicular charger
These models are compatible with APX 8500, APX 7500, APX 6500, APX 4500, APX 1500, XTL 5000, XPR 5350, XPR 5350e, XPR 5550, XPR 5550e, XPR 5580, XPR 5580e, XPR 4350, and XPR 4550.
Adding this wireless mic is easy – replace the palm mic with the combo mic/gateway and “touch-pair” – that’s it. APX users can use the same mic with their portable hand-held radio.
Motorola Wireless Mic Frequently Asked Questions
- Can I use a Bluetooth adapter? No
- Will this work with other radio brands? No
- My mic started speaking the French language. How do I get it back to English? This happens when you power up the mic and press the PTT at the same time. To change languages follow the instructions in the graphic.

- What is WRSM battery model number? PMNN4461
- Can I still use a receive-only earpiece? The WRSM uses the same RLN4941 or PMLN7560 earpieces as most of the the wired mics.
- What do the microphone LED status indicators mean? There are 2 LED lights on the microphone that provide battery level and audio availability status.

- What do the status lights on the WRSM charger mean? The graphic below shows the LED light color indicators and their meanings.

- Does the mic require maintenance? Yes – you should check for firmware updates for improved battery, connectivity, and audio performance especially if more than 6 months old.
Buy online these wireless remote speaker-mics and other radio accessories with low pricing and fast delivery. If you prefer, call our Dover, Delaware office during normal business hours where you will never get an automated attendant or voice mail. We can be reached at 302-734-9250 M-F 8-5pm EST.
OTTO Develops Tactical SWAT Headset with Advanced Situational Awareness
New NoizeBarrier TAC Includes PTT and Radio Connector
OTTO Engineering, a leader in audio accessory development located in Illinois, has introduced a tactical headset with advanced situational awareness for military and SWAT teams. The new NoizeBarrier TAC uses the same technology as the V4-11029 Active Hearing Protection Electronic Earplugs released last year.
The headset has a PTT with clip and a specific radio cable eliminating the need for an adapter. The initial release was designed for the most popular tactical radios – Motorola APX, Harris XG-75, Kenwood TK-5220, and EF Johnson Viking,
The NoizeBarrier TAC specifications are impressive. It is MIL-STD-810G compliant, has a IP68 submersible rating, and has a minimum 23dB NRR. The dynamic, telescopic boom microphone can be mounted on the left or right side. Powered by two AAA batteries, the operating time is up to 72 hours with no degradation of performance.
OTTO NoizeBarrier TAC Spec Sheet OTTO Noizebarrier TAC Brochure
Headsets Available With Links To Current Pricing And Radio Compatibility
OTTO V4-11054BK NoizeBarrier TAC Tactical Headset, PTT – Compatible with APX 8000, APX 7000, APX 6000, APX 4000, APX 3000, APX 1000, XPR 6000, XPR 7000e series, XPR 6350, XPR 6550, XPR 6580, XPR 7350, XPR 7380, XPR 7550, XPR 7580
OTTO V4-11055BK NoizeBarrier TAC Tactical Headset, PTT – Compatible with Harris P5300, P5350 P5370, P5400, P5450, P5470, P5500, P5550, P5570, P5570, P7300 Series, P7370, P7350, XG-15, XG-25, XG-75
OTTO V4-11056BK NoizeBarrier TAC Tactical Headset, PTT – Compatible with Kenwood flat connectors – TK-190, TK-280, TK-380, TK-385, TK-480, TK-481, TK-190, TK-290, TK-390, TK-2140, TK-2180, TK-3140, TK-3148, TK-3180, TK-3212, TK-5210, TK-5220, TK-5310, TK-5320, TK-5400, TK-5410, NEXEDGE NX200G,NX210G, NX300G, NX410/411
OTTO V4-11058BK NoizeBarrier TAC Tactical Headset, PTT – EF Johnson Viking VP400, VP600, VP900
For Other OTTO Radio Accessories Contact Magnum Electronics
Magnum Electronics is an authorized OTTO reseller located in Dover, Delaware. We carry the full OTTO product line including the OTTO 500 high-temperature speaker microphone for firefighter and the Revo 2 noise-cancelling mic. See all our OTTO online products or contact us for a formal quote.
Motorola LEX L11 Rugged LTE Handheld Is FirstNet and FIPS 140 Certified
The LEX L11 is Motorola’s third generation purpose-built smartphone for public-safety
professionals using AT&T FirstNet. The device has an IP68 submersibility rating and has Gorilla Glass 3 on the 5.0 inch display. A dedicated push-to-talk, emergency, and programmable buttons differentiate this from a consumer device. It also has dual front-facing speakers (107dB) and three microphones for noise suppression.
The LEX L11 is built with the Android 7.1 OS and has Bluetooth 4.2 and Wi-Fi 802.11 a/b/g/n/ac/k/r. The 3G/4G LTE radio is UMTS/GSM capable on bands 4, 5, 7, 12, 14, 17, 29, 30, 66 and is AT&T FirstNet certified. A Verizon compatible model is expected to be released in the first half of 2019.
Federal government users should know the LEX L11 is FIPS 140-2 Level 3 Validated.
LEX L11 Pairs With APX 6000/7000/8000 Mission Critical Bluetooth
The LEX pairs with APX 6000, APX 7000, and APX 8000 (including XE) models with internal Bluetooth enabled. It provides remote control of APX radio’s zones, talk groups, and volume, emergency button activation, and allows you to speak directly into LEX L11 over the LMR radio network.
Replacement Batteries and Accessories for LEX L11
The IMPRES 2 PMNN4545 standard swappable battery has 2500 mAh capacity and lasts a typical 10 hour shift. The optional high-capacity PMNN4546 5000 mAh battery lasts up to 20 hours but requires the HN001155A01 replacement back cover.
The LEX has a 3.5mm jack and also supports wired audio accessories. The PMLN4541 2-wire surveillance kit with acoustic tube is the most popular for law enforcement. A lower cost PMLN4540 earbud with inline mic is also available.
LEX L11 Overview Brochure LEX L11 Data Sheet
For more info and pricing, contact our Dover, Delaware office at 302-734-9250 8-5pm EST M-F or email us at [email protected].
New Improved Motorola PMNN4547 IP68 APX 8000H UL Battery
Higher Capacity and Improved Cold Temperature Performance
Motorola recently started shipping a new intrinsically-safe TIA 4950 battery for the APX 8000H and APX 8000HXE HAZLOC radio models. The PMNN4547 battery provides 3100 mAh capacity using Li-ion cells and has an improves cold temperature specification. It has a IP68 rating which means it can survive in six feet of water for up to four hours. It also uses IMPRES 2 technology that provides up to 60% more charging cycles as compared to a standard battery.
Requires A New Carry Holder or Leather Case for APX 6000
The new battery provides 16% more capacity than the 2,650 mAh NNTN8930 UL model. Because the PMNN4547 is about 3mm deeper, APX 6000 and SRX 2200 users will need to upgrade their carrying accessories.
The PMLN7901 plastic carry holder is required to fit the new battery. If you are using the rugged APX 6000XE with larger knobs a PMLN7902 is the correct holster. There are also new APX 6000 leather cases with fixed or swivel belt loops available in our online store.
MotoX Motorcycle Quick-Transition Headset Kit With Wireless PTT
EarPhone Connection, a leader in public-safety audio accessories, has a new low cost headset for motorcycle radio communications. Compatible with hand-held portable 2-way radios, their MotoX kit includes a helmet kit, wireless push-to-talk button for the handlebar, and a unique remote speaker-microphone. The helmet kit works with 3/4 and full-face helmets and includes a noise-cancelling boom microphone.
MotoX Available For Motorola, Harris, Kenwood Radios
The MotoX-34W is compatible with Motorola APX series, XPR 7000, and XPR 6000 models. The MotoX-23W is designed for XTS series, PR1500, MT1500, and other radios with Cosmo connectors.
Most public-safety Harris radios are supported – MotoX-28W includes the XG-75, P7300 connector. The Harris XL-200P and XG-100 require the new MotoX-48W. The MotoX-11W Kenwood multi-pin connector has keen added to their product line compatible with their high tier radios.
Special order kits are also available for Motorola HT750/1250/1550, PR860, and Harris M/A-Com 700P, P7100, P7130, P7150, P7170, P7200, P5100, P5130, and P5150.
MotoX Speaker-Mic Includes Embedded Bluetooth and Unique 3.5mm Jack
The unique remote speaker-mic has embedded Bluetooth and pairs with the wireless push-to-talk button that mounts to the handlebar. The mic also has a special 3.5mm jack that connects the audio to helmet speakers and boom mic. When disconnected, it works like a normal speaker-mic.



