MH-89A4B Earpiece Microphone

The Motorola AAM21X501 MH-89A4B Earpiece Microphone is a lightweight single-wire audio accessory designed for discreet communication with the Motorola EVX-S24 portable two-way radio.

The MH-89A4B features a comfortable over-the-ear speaker that allows users to hear incoming radio communications without relying on the radio's external speaker. Its single-wire design incorporates an inline microphone and push-to-talk (PTT) button, allowing users to transmit conveniently without removing the radio from a belt, pocket, or carrying case.

The ear-hook design provides a secure and comfortable fit while keeping the earpiece outside the ear canal. This makes the MH-89A4B a practical choice for users who need to monitor radio traffic throughout an extended work shift while remaining aware of their surroundings.

Ideal for security, hospitality, retail, education, event staff, property management, and other professional applications, the AAM21X501 provides a compact and discreet alternative to a traditional remote speaker microphone.

Key Features

• Single-wire earpiece microphone

• Over-the-ear ear-hook design

• Integrated earpiece for discreet listening

• Inline microphone for convenient transmitting

• Inline push-to-talk (PTT) button

• Allows one-handed radio operation

• Lightweight design for comfortable extended wear

• Keeps the earpiece outside the ear canal

• Designed for the Motorola EVX-S24 portable radio

• Motorola part number: AAM21X501

• Model: MH-89A4B

Compatible Radios

• Motorola EVX-S24

Always verify your specific radio model before ordering to ensure proper accessory compatibility.

Specifications

Manufacturer: Motorola Solutions / Vertex Standard
Part Number: AAM21X501
Model: MH-89A4B
Accessory Type: Earpiece Microphone / Single-Wire Surveillance Kit
Configuration: Single Wire
Earpiece Style: Over-the-Ear / Ear Hook
Microphone: Inline
Push-to-Talk (PTT): Yes
Volume Control: No
Noise Cancelling: No
VOX: No
Intrinsically Safe: No
Color: Black