Home > Products > Best Radar Detectors of 2024 > Uniden >

Uniden R4

Uniden R4 Radar Detector

Alternative Views:


Extreme Performance GPS Detector

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

SAVE over Uniden, Amazon, and BestBuy on paying sales tax!
(for orders shipping outside of Arizona)

see details)

Price: $379.99

Stock Status:In Stock

Product Code: UNIDEN-R4



Uniden R4 Radar Detector Overview

  • 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.

Uniden Hardwire Kit w/Mute button Laser Veil G6 Stealth Coating Uniden Single Cup Articulating Radar Detector Mount Uniden Cigarette Adapter With Mute / USB
Price: $32.99

Veil G6 Price: $97.95

Price: $24.99

Price: $24.99

Uniden Hardwire Kit with Mute Button Laser Veil G6 Stealth Coating Uniden Single Cup Articulating Radar Detector Mount Uniden Cigarette Adapter With Mute / USB
Uniden Two Suction Cup Radar Detector Mount
Price: $18.99

Uniden Two Suction Cup Radar Detector Mount

Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 20 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great detector ! May 21, 2024
Reviewer: Peter Inhand from Romeoville, IL United States  
I am very happy with my purchase. Shipped quickly and works phenomenal. Picks up most 5.0 s well before they see you. Sometimes I can't believe the range. Not many falses, but I have everything turned on and all the bands set to wide. Check the forums for settings etc. Glad I bought the R4.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 February 12, 2024
Reviewer: Phillip from Brooklyn, NY United States  
I bought the R4 because my R3 was not behaving and I wanted auto lockouts. Uniden has a major problem with over speed warnings that cannot be turned off with speed cameras on. I may be returning it as this is very annoying. Other detectors do not do this.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 August 5, 2023
Reviewer: Morris Cofer from Conway, SC United States  
Product price was lowest of sites reviewed. Delivery was fast.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
1 of 5 Shipped and sold defective unit June 21, 2023
Reviewer: goldendeal from Hot Springs AR  
Purchased a Uniden R4 from Radar Busters as after reading on their website they have a satisfaction guarantee that you won't be stuck with a radar that is defective.This is not the case. I have had the radar 3 days and could not hear anything coming out of the radar. I contacted Radar Busters on this issue and it was determined they sent me a unit with a speaker failure. Instead of making this right and sending a new unit to replace the defective one they want me to go through Uniden. A brand new unit! They will not take reasonability for sending a defective unit. I even offered to upgrade to the R7 so they would at least offer to send a working unit. No, I had to go through Uniden which has yet to contact me. Any other vendor would have taken responsibility for sending a damaged radar and replaced unit immediately. Not pass the buck to the manufacture. I have been waiting to hear from Uniden for 2 weeks. The unit is sitting in a box in my living room. $400 plus wasted. Buyer Beware!

RadarBusters Response:

Matthew, we have attempted communication with you several times via phone and have not received a return phone call and have also been working to resolve this issue to your satisfaction.  

We have spoken to Uniden several times and we were arranging to get a replacement detector sent to you, but we have been informed by Uniden that they have attempted to contact you six times and have not gotten a response.  They are going to attempt to contact you again.

We apologize that you received a unit from them that was defective but this is entirely out of our control and unfortunately given the sales volume of these units and the production numbers that rarely one does have an issue.

In the meantime, despite your dissatisfaction, we have sent you a prepaid return label to return the unit to us for a full refund, since arranging a replacement has been difficult at best,

Was this review helpful to you?

  0 of 0 people found the following review helpful:
4 of 5 instructions June 21, 2023
Reviewer: william lowe from placerville, CA United States  
I wish there were easier verbal instructions to set up advanced adjustments is there one on you tube.

Was this review helpful to you?

View All Customer Reviews