MH-45B4B Heavy Duty Noise Cancelling Speaker Mic
Motorola MH-45B4B Heavy-Duty Noise-Cancelling Speaker Mic: rugged radio comms for high-impact crews Intrinsically safe remote speaker microphone | noise-cancelling element | heavy-duty build | lar...
Motorola MH-45B4B Heavy-Duty Noise-Cancelling Speaker Mic: rugged radio comms for high-impact crews
Intrinsically safe remote speaker microphone | noise-cancelling element | heavy-duty build | large glove-friendly PTT and volume | 3.5 mm earphone jack | Motorola 2-pin connector | one-year replacement warranty.
The MH-45B4B (Motorola part # A13960507) is a rugged, intrinsically safe speaker microphone designed for VE and VX/EVX two-way radio series. Its noise-cancelling audio and durable construction deliver clear communications in extreme, high-impact environments. If you are unsure your exact radio is supported, contact us to confirm fit before ordering.
Who it's for
Built for firefighters, security teams, and industrial operators who need rugged dependability and clear, safety-rated communications in mission-critical environments, even with gloves on and engines running.
Key features
- Heavy-duty construction: built to withstand drops and frequent use; ideal for high-impact settings.
- Noise-cancelling microphone: filters background noise for crisp voice clarity in loud surroundings.
- Large PTT and volume control: easy to use with gloves, with loudspeaker volume adjustability.
- 3.5 mm earphone jack: supports an optional earpiece for private listening.
- Intrinsically safe rated: certified for use with IS-rated radios like the ISVX-410/421 and ISEVX-534/539.
- Wide compatibility: works with Motorola VX- and EVX-series and Vertex Standard models.
Specifications
| Mic impedance | 2.2 kΩ @ 1 kHz |
|---|---|
| Speaker impedance | 8 Ω, max 0.6 W input |
| Weight | ≈220 g (0.49 lb) |
| Connector | Motorola 2-pin + 3.5 mm earjack |
| Certifications | Intrinsically safe (FM/ATEX) with IS radios |
| Warranty | One-year replacement |
What's in the box
- MH-45B4B speaker microphone
- Coiled cord with quick-disconnect
- Swivel clothing clip and belt clip
Frequently Asked Questions
What radios is the MH-45B4B speaker mic compatible with?
It works with Motorola VX-/EVX-series and Vertex Standard radios, and is certified for intrinsically safe models such as the ISVX-410/421 and ISEVX-534/539. Contact us to confirm your exact model before ordering.
Is the MH-45B4B intrinsically safe?
Yes. It is rated intrinsically safe (FM/ATEX) when used with IS-rated radios, making it suitable for hazardous-environment crews.
Does it work with gloves on?
Yes. The large push-to-talk button and volume control are designed for glove-friendly operation in the field.
Can I use an earpiece with it?
Yes. A 3.5 mm earphone jack supports an optional earpiece for private listening in noisy or discreet settings.
What comes in the box?
The MH-45B4B speaker microphone, a coiled cord with quick-disconnect, and a swivel clothing clip plus belt clip.
Detailed specifications are coming soon. In the meantime, here's the basics:
| Brand | 2Way Radio Solutions |
| Product Type | Accessories |
| SKU | — |
Full spec sheet: contact us at 1-800-507-6002
Shipping
- Free shipping over $125 · on qualifying U.S. orders
- Calculated at checkout · many items ship at weight-based rates
- Delivery estimate at checkout · based on item availability & method
- Ships across the U.S. · some products have shipping restrictions
Returns & warranty
- 15-day returns · most new, unopened items for a full refund
- Return shipping covered · if the item arrived incorrect or defective
- Refunds · typically within ~2 weeks of us receiving your return
- Manufacturer warranty · per the manufacturer’s terms
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