What is the Motorola PMMN4092 Mag One Remote Speaker?
The Motorola PMMN4092 is a Mag One remote speaker microphone (RSM) designed for select Motorola two-way business radios, including the CP200d, CP200, CP185, and BPR40/BPR40d. It connects to the radio's 2-pin accessory port and lets a user transmit and receive audio without removing the radio from a belt, holster, or carry case, using a clip-mounted speaker, an omnidirectional microphone, and a push-to-talk (PTT) button. The unit carries an IP57 ingress-protection rating and uses a coiled cord with a clothing clip on the back of the microphone head.
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Specifications
| Specification | Detail |
|---|---|
| Part number | PMMN4092 (known revisions: PMMN4092A, PMMN4092B, PMMN4092C) |
| Compatible radios | Motorola CP200d, CP200, CP185, BPR40, BPR40d. Also compatible with the MOTOTRBO R2 series, which shares the CP200d accessory connector. |
| Connector type | Motorola 2-pin accessory connector |
| Microphone type | Omnidirectional |
| Push-to-talk (PTT) | Yes |
| Clip | Clothing clip on the rear of the microphone head |
| IP rating | IP57 (dust-protected; withstands immersion in water for at least 30 minutes per the IP57 standard) |
| Dimensions (H × L × D) | 46.7 mm × 27 mm × 75 mm |
| Weight | 95 g |
| Manufacturer warranty | Motorola one-year warranty |
What's in the box
The PMMN4092 ships as a single assembled unit: the speaker microphone head with its attached coiled cord, the 2-pin radio connector, and the integrated clothing clip.
Who this product is for
A remote speaker microphone is used when an operator needs to keep a radio clipped to a belt or stored in a holster while still hearing transmissions and speaking without raising the radio to their face. The PMMN4092 belongs to Motorola's Mag One value line, which is tested and certified by Motorola but built to lighter-duty specifications than the Motorola Original (IMPRES) accessory line. It suits operations that want a genuine, warrantied Motorola accessory for low-to-moderate daily use rather than continuous heavy-duty field service.
Common environments include:
- Hospitality — front desk, housekeeping, valet, and maintenance staff who carry a radio throughout a shift and need hands free for luggage, cleaning, or guest service.
- Retail and grocery — floor associates, stock teams, and loss-prevention staff coordinating across a sales floor or back-of-house.
- Warehousing and light manufacturing — workers moving product or operating equipment who need the radio clipped and the microphone at collar level.
- Education and facilities — campus maintenance, custodial, and grounds teams.
- Events, recreation, and security — ushers, parking, and event staff who need quick PTT access while moving.
Because the PMMN4092 has no intrinsic safety rating, it is not appropriate for environments with flammable gases, vapors, or combustible dust. Operations in those settings should select an intrinsically safe accessory rated for the hazard.
Key features
- Omnidirectional microphone with a push-to-talk button for transmit and receive without handling the radio.
- Front-facing speaker for receiving audio at collar or chest level.
- Coiled cord that extends for use and retracts to reduce slack.
- Clothing clip on the back of the microphone head for attachment to a shirt, collar, or lapel.
- IP57 rating for protection against dust and temporary water immersion.
- 2-pin connector for direct attachment to compatible Motorola radios.
- CE certified and covered by Motorola's one-year manufacturer warranty.
- Part of the Mag One line, tested and certified by Motorola.
Frequently asked questions
Which Motorola radios is the PMMN4092 compatible with?
The PMMN4092 is compatible with the Motorola CP200d, CP200, CP185, BPR40, and BPR40d two-way radios, which all use the same Motorola 2-pin accessory connector. It is also compatible with the MOTOTRBO R2 series, because the R2 shares the CP200d accessory port. It is not compatible with radios that use a different connector, such as the multi-pin SL or APX series ports.
Does the PMMN4092 have a 3.5 mm earpiece jack?
No. According to Motorola's published specifications, the PMMN4092 has no earpiece connector or audio jack, so a listen-only or surveillance earpiece cannot be plugged into it. Some third-party listings incorrectly show a 3.5 mm jack on this part. If you need an RSM with an earpiece jack for a CP200d-family radio, a different accessory model is required.
What does the IP57 rating mean for this microphone?
IP57 is a two-part ingress-protection rating. The "5" indicates the unit is dust-protected (limited dust ingress that does not interfere with operation), and the "7" indicates it can withstand immersion in water down to roughly one meter for up to 30 minutes. It is suitable for rain, splashes, and brief submersion, but it is not rated for prolonged underwater use or for use in hazardous, explosive atmospheres.
Is the PMMN4092 a genuine Motorola accessory?
Yes. The PMMN4092 is part of Motorola's Mag One line, which is tested and certified by Motorola. The Mag One line is positioned as a value-tier accessory for lighter-duty use and does not meet the rugged specifications of the Motorola Original (IMPRES) line. It carries Motorola's one-year manufacturer warranty.
What is the difference between the PMMN4092 and the PMMN4092A, B, or C?
PMMN4092A, PMMN4092B, and PMMN4092C are hardware revision suffixes of the same base part. They identify production revisions of the PMMN4092 and are functionally interchangeable as the Mag One remote speaker microphone for the listed radios. Sellers may list any of these suffixes for the same accessory.
How does the PMMN4092 attach to the radio and to clothing?
The microphone connects to the radio through a 2-pin plug that seats into the radio's side accessory port. The microphone head has a clip on its back that fastens to a shirt, collar, or lapel, and the coiled cord runs from the head down to the radio so the radio can stay on a belt or in a holster. To reduce strain on the radio's accessory port over time, some users add a Motorola accessory retainer (for example, the RLN5500) for strain relief.
Can the PMMN4092 be used in environments with flammable gas or dust?
No. The PMMN4092 has no intrinsic safety (IS) rating, so it should not be used in hazardous locations where flammable gases, vapors, or combustible dust may be present. Operations in those classified areas should use an accessory and radio that carry the appropriate intrinsic safety certification for the hazard.
Related products and resources
Related two-way radios and accessory resources at Tech Wholesale:
- Motorola CP200d two-way radio
- Motorola R2 series two-way radios
- Motorola CP-series radio accessories
Authoritative external references:
