Remote Push-to-Talk Button with Velcro Mount

The Motorola RLN4857B is a genuine remote push-to-talk button designed for compatible Motorola mobile-radio and visor-microphone installations.

Its included Velcro-style attachment allows the button to be positioned within easy reach on a dashboard, console or other suitable vehicle surface.

When paired with a compatible visor-mounted microphone, the RLN4857B lets operators transmit without picking up a traditional palm microphone, supporting a convenient hands-free-style communications setup.

Key Features

• Remote push-to-talk control

• Velcro-style attachment for flexible placement

• Mounts within easy reach of the operator

• Supports compatible visor-microphone installations

• Allows transmission without holding a palm microphone

• Simple press-and-hold operation

• Suitable for vehicle and fixed installations

• Genuine Motorola Solutions accessory

Product Specifications

• Manufacturer: Motorola Solutions

• Model Number: RLN4857B

• Accessory Type: Remote push-to-talk button

• Control Type: Momentary PTT switch

• Mounting Method: Velcro-style touch fastener

• Connection Type: Wired

• Application: Compatible Motorola mobile radios

• Color: Black

Push-to-Talk Operation

The RLN4857B provides a remotely positioned control for activating radio transmission.

To operate:

• Press and hold the button to transmit

• Speak toward the connected visor microphone

• Release the button to return to receive mode

The button does not contain a microphone or speaker and must be connected to a compatible radio and audio installation.

Compatible Microphone Systems

The RLN4857B can be used with select Motorola visor-microphone configurations, including compatible installations using:

• Motorola GMMN4065D Visor-Mounted Microphone

• Other approved Motorola remote or visor microphones

Compatibility depends on the complete radio, microphone and wiring configuration. Confirm all component part numbers before ordering.

Compatible Radio Families

The RLN4857B supports select Motorola mobile radios, including compatible models from the:

• MOTOTRBO XPR 2500

• MOTOTRBO CM200d

• MOTOTRBO CM300d

• Motorola TLK 150

• Select Motorola MTM5000 TETRA mobile radios

• Corresponding regional Motorola mobile-radio families

Compatibility varies by model, rear-accessory connector and installation configuration.

Flexible Velcro Mounting

The included touch-fastener attachment allows the button to be positioned:

• On a dashboard

• Alongside a center console

• Near a steering-wheel operating position

• Beside other vehicle controls

• Within reach of a seated operator

• At a fixed control-station workspace

Clean and prepare the mounting surface before installation. The button must not interfere with steering, airbags, visibility or safe vehicle operation.

RLN4857B vs. RLN5926A

The RLN4857B is a vehicle-mounted pushbutton supplied with a Velcro-style attachment and is commonly associated with compact MOTOTRBO and compatible visor-microphone installations.

The RLN5926A supports both hand-strapped and vehicle-mounted operation and is associated with different Motorola radio and visor-microphone platforms.

The two products should not be treated as interchangeable without confirming the complete system configuration.

Package Contents

• One Motorola RLN4857B remote push-to-talk button

• Velcro-style attachment material

Visor microphone, mobile radio and additional wiring accessories are not included.

Ideal Applications

• Commercial fleet vehicles

• Utility and service trucks

• Transportation and logistics

• Construction equipment

• Delivery vehicles

• Motorola TLK 150 installations

• Hands-free-style radio systems

• Custom mobile-radio installations

Always follow applicable laws and workplace policies regarding radio use while operating a vehicle.

Why Buy from Delmarva Communications?

Delmarva Communications provides genuine communications equipment backed by more than 20 years of industry experience. Our team can help confirm compatibility between your Motorola radio, visor microphone and external PTT control.