Vertex Standard MH-101A4B 1-Wire Surveillance Earpiece with Clear Acoustic Tube & PTT

The Motorola Vertex Standard MH-101A4B is a discreet 1-wire surveillance earpiece designed for compatible EVX and VX Series portable radios. It combines incoming audio, an in-line microphone and push-to-talk control into one streamlined cable.

A clear acoustic tube delivers incoming communications directly to the ear, helping users monitor radio traffic more privately without broadcasting audio through the radio’s speaker. The included mushroom-style ear tip can be worn in either the right or left ear.

The in-line microphone and push-to-talk button allow convenient transmissions while the radio remains concealed or secured to the user’s belt. This makes the kit well suited for security, hospitality, retail and other customer-facing operations.

Key Features

• Discreet single-wire surveillance design

• Clear acoustic-tube earpiece

• Comfortable mushroom-style ear tip

• Can be worn in the right or left ear

• Combined in-line microphone and push-to-talk button

• Routes incoming radio audio directly to the user’s ear

• Lightweight design for extended use

• MIC/SP radio accessory connector

• Model: MH-101A4B

• Manufacturer part number: AAL83X501

Product Specifications

• Product Type: One-wire surveillance earpiece kit

• Model: MH-101A4B

• Manufacturer Part Number: AAL83X501

• Earpiece Style: Clear acoustic tube

• Ear Tip: Mushroom style

• Microphone: In-line

• Push-to-Talk: In-line and integrated with microphone

• Supported Ear: Right or left

• Volume Control: No

• VOX Support: No

• Noise-Canceling: No

• Intrinsically Safe Rating: No

• Connection Type: MIC/SP accessory plug

• Compatible Brand: Motorola Vertex Standard

Compatible Radios

Compatible models include:

• Motorola Vertex Standard EVX-261

• Motorola Vertex Standard EVX-531

• Motorola Vertex Standard EVX-534

• Motorola Vertex Standard EVX-539

• Vertex Standard VX-160

• Vertex Standard VX-231

• Vertex Standard VX-261

• Vertex Standard VX-264

• Vertex Standard VX-350 Series

• Vertex Standard VX-410

• Vertex Standard VX-420

• Vertex Standard VX-450 Series

Compatibility depends on the radio’s accessory connector. Verify the complete radio model before ordering.

One-Wire Configuration

The earpiece, microphone and push-to-talk control share a single cable running to the radio. This configuration reduces cable clutter and is ideal for users who want a straightforward surveillance accessory for everyday discreet communication.

Package Contents

• One MH-101A4B surveillance earpiece assembly

• Clear acoustic tube

• Mushroom-style ear tip

• Integrated in-line microphone and push-to-talk button

• Two-way radio is not included

Ideal Applications

• Private security

• Retail loss prevention

• Hospitality and hotels

• Event coordination

• Executive and VIP protection

• Education and campus operations

• Healthcare facilities

• Customer-facing businesses

Why Buy from Delmarva Communications?

Delmarva Communications supplies professional two-way radio equipment and discreet audio accessories for commercial, industrial and public safety applications. Our experienced team can help verify radio and surveillance-kit compatibility before you order.