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C29LXMAX - Cobra® Max CB "Smart" Radio

30 days
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Cobra® has stoppped production of the C29LX AM version and is switching over to the C29LX AM/FM version.  We hope to have these new radios in stock in the beginning of 2024.

"Smart CB Radio"

The 29 LX MAX offers drivers a legal way to communicate safely and easily on their smartphone with this Cobra® CB Radio with BT Wireless Technology and enhanced Smartphone Features.

With Smartphone Enhanced Features & legal handsfree phone calling.

  • Cobra® iRadio App Integration
  • Report live police speed traps and road hazards
  • Receive red light camera alerts


  • Red Light Camera Alerts
  • Handsfree calling and texting
  • Caller ID with Voice
  • Weather alerts
  • Rewind-Say-Again
  • 4 colors LCD display
  • NightWatch illumination

Unit Dimensions:

  • Height - 2.25"
  • Width - 7.25"
  • Weight - 5.6 lbs

In the Box:

  • Radio
  • Multi-function Microphone
  • External Microphone for hands-free phone calls
  • Mounting hardware for CB and microphone
  • Power Cord- Do you need a replacement power cord? Check out the AUCB91.
  • Owner's Manual (see PDF in Attachments Tab)
  • Registration Card
  • FCC Rule Booklet


  • 4 Watts
  • 40 CB Channels
  • 10 WX (Weather) Channels
  • UPC: 028377201936
  • Looking for a power supply for this radio?   Check out the PS8.

Apple / Android apps are available for the C29LXMAX!


Tuning your antenna using the Cobra® C29LXMAX:

Turn the radio on.

Set to Channel 40.

Push the S/RF/CAL/SWR button next to the meter to "CAL" for calibration.

Press and hold the mic button.

Adjust the SWR CAL knob on the bottom right until the meter swings right and sets to "CAL" on the meter.

Keeping the mic button depressed, press the S/RF/CAL/SWR button again and switch to "SWR" and write down the SWR reading on the meter.

Repeat the steps above on Channel 1.

Use your SWR readings to make adjustments to your antenna accordingly.

If channel 40 SWR is higher than channel 1 SWR, lower/shorten the antenna.  If channel 1 SWR is higher than channel 40, lengthen/extend the antenna.  The goal is to have the reading be similar and both be under 2 or lower (ideally). 

Information on SWR Readings and Tuning Your Antenna


Additional Info

5.00 in
5.00 in

C29LXMAX Owner's Manual (29LX_MAX_MANL.pdf, 10,493 Kb) [Download]

Setting SWR Page 1 (C29LXMAX_Set_SWR_Page_1.png, 180 Kb) [Download]

Setting SWR Page 2 (C29LXMAX_Set_SWR_Page_2.png, 208 Kb) [Download]

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