MH-37A4B-1 Earpiece Microphone Single Wire Surveillance Kit

The Motorola AAK50X501 MH-37A4B-1 Single-Wire Surveillance Kit is a lightweight earpiece microphone designed for discreet and convenient communication with compatible Motorola and Vertex Standard portable two-way radios.

The single-wire design combines an over-the-ear speaker, inline directional microphone, and push-to-talk (PTT) button into one compact audio accessory. Users can listen to incoming radio traffic discreetly while transmitting without having to remove the radio from a belt, pocket, or carrying case.

The over-the-ear design provides a comfortable fit for extended use while keeping radio communications close to the user. Its inline PTT and microphone allow convenient one-handed operation, making the MH-37A4B-1 especially useful in environments where fast and discreet communication is important.

Ideal for security, hospitality, retail, education, event staff, property management, and other professional applications, the AAK50X501 provides a simple and lightweight solution for users who need private radio audio without the bulk of a traditional speaker microphone.

Key Features

• Single-wire surveillance earpiece microphone

• Integrated over-the-ear speaker

• Inline directional microphone

• Inline push-to-talk (PTT) button

• Allows discreet listening to radio communications

• Supports convenient one-handed radio operation

• Lightweight design for comfortable extended wear

• MIC/SP radio connection

• No separate adapter required for compatible radios

• Designed for compatible Motorola and Vertex Standard portable radios

• Motorola part number: AAK50X501

• Model: MH-37A4B-1

Compatible Radios

• Motorola / Vertex Standard EVX-261

• Motorola / Vertex Standard EVX-531

• Motorola / Vertex Standard EVX-534

• Motorola / Vertex Standard EVX-539

• Motorola / Vertex Standard VX-261

• Motorola / Vertex Standard VX-264

• Motorola / Vertex Standard VX-451

• Motorola / Vertex Standard VX-454

• Motorola / Vertex Standard VX-459

The MH-37A4B-1 may also support additional legacy Vertex Standard portable radios using the same compatible accessory connection. Always verify your specific radio model before ordering.

Specifications

Manufacturer: Motorola Solutions / Vertex Standard
Part Number: AAK50X501
Model: MH-37A4B-1
Accessory Type: Earpiece Microphone / Surveillance Kit
Configuration: Single Wire
Earpiece Style: Over-the-Ear
Microphone: Directional, Inline
Push-to-Talk (PTT): Yes, Inline
VOX: No
Noise Cancelling: No
Intrinsically Safe: No
Connection: MIC/SP Jack Plug
Color: Black