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RoadKing RK5640 40 Channel CB Radio with USB Port and RK56NC Mic

RoadKing RK5640 40 Channel CB Radio with USB Port and RK56NC Mic

by: Roadking
Part# RK5640
  • Includes RK56 Noise Canceling Mic
  • Blue LED Backlit Control Knobs
  • Front Mounted USB Jack
RK5640 image - RK5640.jpg
RK5640 image - RK5640_L.jpg
RK5640 image - RK5640_back.jpg
RK5640 image - RK5640_box.jpg

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RoadKing RK5640 40 Channel CB Radio with USB Port and RK56NC Mic
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New from Road King is the RK5640 CB radio. It comes prepackaged with their popular RK56 noise canceling microphone which normally sell for around $60 by themselves. The radio is compact enough to fit into most cubby holes in semi trucks. Built in SWR meter to help tune in your vehicles antenna system, and an SWR alert light to tell you if there's a problem with the antenna system. Comes with a front mounted USB jack to help charge devices such as a cell phone or bluetooth headset.


Front panel 2.1 Amp USB port to use and charge your portable devices
RK56 Noise-Canceling CB Microphone with chrome grill and button
Backlit control knobs with two brightness settings
SWR Calibration to fine tune the Perfect Match
RF Gain reduces sensitivity to distant noise and signals that are too weak
Squelch control eliminates background noise
Front panel 4-Pin CB microphone connector
Antenna warning indicator alerts of a problem with the antenna system

Specifications, Weight, Dimensions

Frequency Range
26.965 ~ 27.405 MHz
8 3/4" from back of case to bezel
10 1/4" from antenna jack to control knobs
7 5/16"
2 3/16"
Current Draw
2 Amp
Microphone Pin-Out
Standard 4-Pin
Power Connection
3-Pin Standard

What's Included

  • RK56NC 4 Pin Noise Canceling Mic
  • 3 Pin Power Cord
  • Mounting Bracket and Knobs
  • Owner's Manual
Last Modified: 02/26/2018