Description
Single-Wire Earpiece with Inline Microphone and PTT for EVX-S24
The Motorola MH-89A4B, part number AAM21X501, is a single-wire surveillance earpiece kit for the Motorola EVX-S24. Its ear-clip design provides personal listening, while an inline microphone and push-to-talk button let you transmit without holding the radio.
Route the cable along your clothing and use the clothes clip to help keep it in place during a shift. The foam ear tip provides a cushioned listening contact, although fit and comfort vary by wearer. Personal listening helps keep received audio out of the radio's loudspeaker; it does not encrypt the radio signal or guarantee confidential communications.
Key Features
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Single-wire design: Combines receive audio, microphone and PTT functions in one wired accessory.
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Ear-clip style: Over-the-ear arrangement for discreet listening.
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Inline microphone and PTT: Provides transmit control within reach while the radio remains secured.
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Foam ear tip: Cushioned contact for the earpiece.
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Clothes clip: Helps manage the cable during use.
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Model-specific fit: Listed for the EVX-S24; do not assume compatibility with other radios based on plug appearance.
Specifications
| Attribute |
Details |
| Brand |
Motorola |
| Accessory model |
MH-89A4B |
| Part number / SKU |
AAM21X501 |
| Product type |
Single-wire surveillance earpiece kit |
| Earpiece style |
Ear clip / over-the-ear |
| Microphone |
Inline |
| Push-to-talk |
Yes |
| Noise canceling |
No, as listed |
| VOX activation |
No, as listed |
| Connection |
Radio MIC/SP plug |
| Ear tip |
Foam |
| Cable management |
Clothes clip |
Radio Compatibility
This listing does not establish fit for EVX-S30 or other Motorola and Vertex Standard radios. Confirm any model not shown before ordering.
What's Included
| Item |
Status |
Details |
| MH-89A4B earpiece kit |
Included |
AAM21X501 single-wire accessory with inline microphone and PTT |
| Foam ear tip |
Included |
As specified in the existing package description |
| Clothes clip |
Included |
For cable management |
| EVX-S24 radio |
Not included |
Sold separately |
| Spare ear tips or additional accessories |
Not specified as included |
Confirm separately if needed |
Frequently Asked Questions
Which radio does the MH-89A4B fit?
This earpiece is listed for the Motorola EVX-S24. Check with Atlantic Radio before using it with a different radio model.
Are MH-89A4B and AAM21X501 the same item in this listing?
Yes. MH-89A4B is the accessory model name and AAM21X501 is the part number used for this listing.
Can I transmit as well as listen?
Yes. The kit includes an inline microphone and push-to-talk control for transmitting, along with the earpiece for receiving audio.
Does it support hands-free VOX transmission?
No. VOX activation is listed as unsupported. Use the PTT button to transmit; wearing an earpiece does not make transmission automatic.
Does the microphone provide noise cancellation?
No. Noise canceling is listed as unsupported. Do not treat this accessory as a noise-canceling headset or hearing protector.
Is this a Bluetooth earpiece?
No. It is a wired accessory that connects to the radio's MIC/SP connection.
Does discreet listening make the radio signal secure?
No. The earpiece provides personal receive audio rather than playing it through the radio speaker. Encryption and radio-system security are separate functions.
Will it fit the EVX-S30?
EVX-S30 compatibility has not been established for this listing. Do not assume fit based on a similar radio name or connector; confirm before purchase.
Is the radio included?
No. This purchase is for the earpiece kit. A compatible EVX-S24 radio is required separately.
What warranty is listed?
The MH-89A4B is listed with a 1-year manufacturer's warranty.
Warranty
1-year manufacturer's warranty.
Need help confirming fit? Contact Atlantic Radio with your radio model and accessory requirements.
