Vertex Standard MH-90A4B Compact Speaker Microphone for EVX-S24 & EVX-S30

The Motorola Vertex Standard MH-90A4B is a compact remote speaker microphone designed for EVX-S24 and EVX-S30 portable two-way radios. It provides convenient access to incoming audio and push-to-talk communication while the radio remains secured to the user’s belt or clothing.

Its compact, lightweight design is ideal for professionals who need a less bulky speaker microphone for daily communication. The integrated clothing clip allows the microphone to be positioned near the shoulder for convenient listening and transmitting.

A built-in 3.5mm audio jack supports a compatible receive-only earpiece, providing a more discreet way to monitor radio traffic in public, customer-facing or moderately noisy environments.

Key Features

• Compact remote speaker-microphone design

• Integrated push-to-talk button

• Built-in speaker for convenient radio monitoring

• Clothing clip for shoulder or lapel attachment

• 3.5mm jack for a compatible receive-only earpiece

• Allows communication while the radio remains securely carried

• Designed specifically for EVX-S24 and EVX-S30 radios

• Model: MH-90A4B

• Manufacturer part number: AAM24X501

Product Specifications

• Product Type: Compact remote speaker microphone

• Model: MH-90A4B

• Manufacturer Part Number: AAM24X501

• Transmit Control: Integrated push-to-talk button

• Audio Output: Built-in speaker

• Accessory Connection: 3.5mm audio jack

• Attachment: Integrated clothing clip

• Compatible Brand: Motorola Vertex Standard

• Color: Black

Compatible Radios

Designed for use with:

• Motorola Vertex Standard EVX-S24

• Motorola Vertex Standard EVX-S30

This microphone uses a model-specific radio connection. Verify the complete radio model before ordering.

3.5mm Earpiece Connection

The built-in 3.5mm jack allows a compatible receive-only earpiece to be connected directly to the speaker microphone. Incoming communications are routed to the earpiece for more private listening, while transmissions are made using the microphone’s push-to-talk button.

The optional earpiece must have the correct 3.5mm plug and electrical configuration.

Package Contents

• One MH-90A4B compact speaker microphone

• Integrated clothing clip

• Two-way radio and optional 3.5mm earpiece are not included

Ideal Applications

• Retail and hospitality

• Education and campus operations

• Property and facility management

• Security teams

• Warehousing and distribution

• Event coordination

• Healthcare facilities

• Commercial radio users

Why Buy from Delmarva Communications?

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