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Uniden R4

Uniden R4 Radar Detector

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Extreme Performance GPS Detector

Uniden's new extreme high performance Uniden R4 radar detector, includes 1-year warranty.

SAVE on paying sales tax! (for orders shipping outside of Arizona)


Shipping Delay Notice: We will be doing inventory from Wed 29th to Fri 31st of March and will ship all orders placed between those two days on Monday. We apologize for this inconvenience and appreciate your patience.
Price: $449.95
SALE $379.95

Stock Status:In Stock

Product Code: UNIDEN-R4




  • The Uniden R4 is the highest performing single antenna radar detector
  • Provides advanced digital signal processing (DSP)
  • Dual LNA design for extreme performance
  • MRCD/Gatso detection
  • Extreme sensitivity
  • GPS with red light and speed camera alerts
  • Free GPS database updates downloadable from Uniden
  • Quiet Ride - User set speed auto mute
  • Updatable via USB connection to PC
  • Uniden offers the brightest and most readable full color OLED display available
  • Multi-function display includes voltage, compass, altimeter, time of day
  • K false filter
  • KA false filter
  • Ka Narrow/Wide
  • Nearly SPECTRE undetectable
  • Unique to Uniden, two different suction cup style mounting brackets included
  • Cigarette adapter with MUTE KEY and USB JACK
  • Carrying case
The Uniden R4 is one of two new Uniden radar detectors, having even higher performance than the Uniden R3, the other new radar detector, is the dual-arrow Uniden R8.

Having more than 14-times the capture distance of a police radar gun, the Uniden R4 provides performance often exceeding all other manufacturers' top performing detectors at considerably less money and is currently the most sensitive single antenna detector we've ever tested!

The result is that the Uniden R4 will provide you with more than ample warning of instant on K and Ka band miles away.


One of the main benefits of the Uniden R4 is that it now incorporates an LNA for Ka-band as well as an LNA for X-band and K-band for about a 3dB increase in sensitivity over the Uniden R3.

Easy Advanced Programming Video Tutorial

Programming your Uniden R4 for the specific conditions you drive is easy. Just press the menu button and you can select from various different options that include the sensitivity, the filtering, the brightness of the display and more. You can read a detailed Uniden R4 Review.

Included Accessories

Your Uniden R4 comes shipped to your door with everything you need including two windshield mounts--unique to Uniden-- a 12-volt accessory power cable with USB data port, carrying case, and a Uniden instruction manual.

Have any questions concerning your Uniden purchase?

Please email our support team 24/7 and we will promptly get back to you or call us during normal business hours to speak directly to one our countermeasure experts.

Why Buy from RadarBusters?

Expertise: RadarBusters is one of the longest operating and most experienced countermeasure-dedicated companies in the industry. We are not a big box electronics store that offers everything under the sun. You will find no other company that offers the same level of pre- and post-sales expertise, than us.

Authorized Uniden Dealer: RadarBusters is an authorized dealer for Uniden so you can be assured that you detector is covered under Uniden's full warranty.

Real Reviews: Unlike the other review websites out there, RadarBusters was founded by Radar Roy, a retired cop and certified traffic radar instructor with over 40 years of experience. Luxury Automotive was so impressed with our high standards and qualifications that they dubbed us the “General Schwarzkopf of radar detectors”.

No Sales Tax: You will not be charged sales tax as long as your order is shipped outside of Arizona.

We Have Answers: Have a question or concern? Please call or email us and we will be happy to assist you. If you think you are having an issue with your product in most cases we should be able to help you resolve it over the phone.

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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 8 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 The reviews do not lie! February 1, 2023
Reviewer: Anonymous Person from New York  
The R4 is a solid radar detector with a price that is just right! It does the job you want and expect it to.
No regrets!

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  0 of 0 people found the following review helpful:
5 of 5 Uniden R4 December 16, 2022
Reviewer: Bryan M from Grand Forks, ND United States  
So far it performs well.  I have a beltronics STIr mounted in vehicle and bought R4 to swap into other cars. When both were on the R4 detector went off well ahead of the Beltronics one. It detected one speed trap miles ahead over a couple hills. False alarms from K band passing cars were similar. The GPS works perfectly and warned of traffic cameras even when pulled down and sitting on the console.

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  0 of 1 people found the following review helpful:
4 of 5 New Purchase Uniden R4 vs R3 December 16, 2022
Reviewer: Mark Buday from Easton, PA United States  
Had to purchase a new Radar unit by Uniden from RadarBusters after my R3 stopped any audible sound (I believe due to bad speaker going?).  Anyway made my choice of the newer R4 for the price.  However, the big negative for me was the audible alert sound is NOT as high as the R3.  Like a 20% drop in the sound.  I always depend on the sound to alert me as the unit is too far away from me driving from the windshield.  I can NEVER read the color bar from where I sit so having this newer version - R4, have a drop in audible sound does NOT make me happy.
I the positive, the unit seems to be noticeably quiter (in terms of false alerts).  I still drive on the same highways and roads daily, so I feel my experiences and input are valid with the R4.
I don't know the Uniden R4 unit like one of the radar geeks and only use the basics to avoid tickets. If I had the disposable money to spend, I would have gone with the Uniden R7.
Time will tell if I am happy with the R4 over the R3 unit.

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  0 of 0 people found the following review helpful:
5 of 5 Uniden R4 October 14, 2022
Reviewer: Roberto Vivas from HAWKINSVILLE, GA United States  
Great shopping experience. Received the radar within 2 days.  Thank you!

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  0 of 0 people found the following review helpful:
5 of 5 Picks up KA band a long distance October 9, 2022
Reviewer: Luis Melendez from Midland, TX United States  
First time used it and was very impressed, I upgraded from a older detector and am very happy

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