Customer Ratings & Reviews

Great detector but if you're you like arrows then spend the extra and get one that has them.

The radar signals on the highway are very accurate.

Was a great radar detector for awhile... now it turns off by itself and you dont even know it has..

I needed to step up to a modern radar detector (RD) to replace my still functioning but outdated (lacking frequency blocking ability) Beltronics Vector 955. Over the last 2 years of my due diligence, I physically tried out a Radenso DS1, the Uniden R7 and the R8. Each of the aforementioned options had their own pros and cons but at their price points at the time of testing, I could NOT justify keeping them over my old RD that basically did the same but was just much louder because it does not allow for frequency blocking on newer vehicles. At the price point I was able to acquire my Uniden R4Blk in 12/2024, I have not had a single reason (read: con) to question my informed purchase decision. I won't bore you with the specs, you know what they are (or should before buying it). As an experienced RD user for over 15+ years, this firmware updated, arrowless UR4 is as quiet as one can ever hope to use. In our extensive California, Nevada, Idaho, Oregon travels, the Ka band and laser notifications are THE only warnings that we need to heed. In our most recent 3k+ mile round trip through the aforementioned states in 06/25, this dialed in RD was on point throughout and blissfully quiet otherwise. The quiet part is where I find the most value. NO ONE wants a RD that is constantly chirping for unimportant warnings. It again accurately warned across blind turns, blind hills and on long, long straight aways. I specifically noted a 3+ mile Ka warning out on the desolate I-95N in NW Nevada. To any RD user, arrows should not matter (save $100+ by not having them). You should be so in tune with the RD warnings that are important for your route(s), that you instinctively check your speed (read: brake no matter your speed while simultaneously checking your actual speed limit). That is all a RD is supposed to do. It is a tool to give you a chance to check your speed before getting popped for speeding. I can and do give my unequivocal, road tested approval to this particular model for its accuracy, firmware update frequency, PRICE POINT and reliability. P.s. This UR4BLK unit was my specific target model due to the fact that the matte black construction absolutely keeps the glare down from every angle. A big improvement over my other RD that has a silver/chrome top side that at times can be "blinding." P.s.s. Combine this tool with the Waze app. and you can turn the odds of road travel without speeding violations to your favor. ALWAYS STAY VISUALLY AWARE! I needed to step up to a modern radar detector (RD) to replace my still functioning but outdated (lacking frequency blocking ability) Beltronics Vector 955. Over the last 2 years of my due diligence, I physically tried out a Radenso DS1, the Uniden R7 and the R8. Each of the aforementioned options had their own pros and cons but at their price points at the time of testing, I could NOT justify keeping them over my old RD that basically did the same but was just much louder because it does not allow for frequency blocking on newer vehicles. At the price point I was able to acquire my Uniden R4Blk in 12/2024, I have not had a single reason (read: con) to question my informed purchase decision. I won't bore you with the specs, you know what they are (or should before buying it). As an experienced RD user for over 15+ years, this firmware updated, arrowless UR4 is as quiet as one can ever hope to use. In our extensive California, Nevada, Idaho, Oregon travels, the Ka band and laser notifications are THE only warnings that we need to heed. In our most recent 3k+ mile round trip through the aforementioned states in 06/25, this dialed in RD was on point throughout and blissfully quiet otherwise. The quiet part is where I find the most value. NO ONE wants a RD that is constantly chirping for unimportant warnings. It again accurately warned across blind turns, blind hills and on long, long straight aways. I specifically noted a 3+ mile Ka warning out on the desolate I-95N in NW Nevada. To any RD user, arrows should not matter (save $100+ by not having them). You should be so in tune with the RD warnings that are important for your route(s), that you instinctively check your speed (read: brake no matter your speed while simultaneously checking your actual speed limit). That is all a RD is supposed to do. It is a tool to give you a chance to check your speed before getting popped for speeding. I can and do give my unequivocal, road tested approval to this particular model for its accuracy, firmware update frequency, PRICE POINT and reliability. P.s. This UR4BLK unit was my specific target model due to the fact that the matte black construction absolutely keeps the glare down from every angle. A big improvement over my other RD that has a silver/chrome top side that at times can be "blinding." P.s.s. Combine this tool with the Waze app. and you can turn the odds of road travel without speeding violations into your favor.

Excellent detector! Have had for a few months now. The Auto mute mem is a nice upgrade from the r3. Comes set out of the box to alert at full volume at first, and then drops the volume. Have picked up Ka band from 4 mile in good conditions!

I recently returned from a trip from Kansas to Colorado. My R4 worked flawlessly. Depending on the terrain, it picked up cops running radar anywhere from over a mile away to 3 and even up to 5 miles away. It’s the best radar detector I’ve ever owned. I just wish it was 100% true stealth. But other than that it’s awesome. And you just can’t beat it for the price. Escort should be ashamed of their radar detectors in comparison. I’ve purchased my last Escort radar detector. That company is a joke. I bought my R4 at Best Buy for just over $300 on sale a while back. I also use R4 companion and it integrates perfectly with the R4. It’s well worth the $10 for the app on iOS. I have this mounted above my visor with a visor mount i purchased from eBay so it’s also well hidden in my Mazda. Using the R4 with R4 companion and Waze is a trifecta of awesome counter-measures. I can’t say enough good things about the R4. Great job Uniden. I highly recommend this detector.

This radar/laser detector has the circuitry of the top of the line R8 & R9 models with the exception of the rear facing antenna for the direction arrows feature. The range is the best in class and it detects K band, X Band, Ka Band, and Laser speed measuring devices. There are many options and settings available for the enthusiast yet easy enough for the beginner willing to set it up properly for their locale. Extensive filtering is available to minimize false alerts as well as GPS and velocity based muting. Firmware updates and traffic camera database updates are free. At about half the price of an R8, the R4 is a great value. If it saves you from one speeding ticket, it has paid for itself.

Uniden radar detectors are some of the best of the best on the market! I have had the R7 for a while now and decided to try out the R4. It's a superior detector with one deal breaker issue! You can hardly hear it when it alerts! With the volume on 8, that's as high as it will go, and it's as loud as the R7 volume set on #3! Why on earth would they do that to such a well-known, superior radar detector? If i would have known that it isn't very loud at all, i never would have paid almost $400 bucks for it! But it just so happens that i have an Escort Amplified External Speaker that i used on my 8500x50. Hooked it up to the R4 and you can definitely hear it now! It's extremely loud & crystal clear for when your cruising around with the bass bumping! Other than having to use an external speaker, the R4 is everybit as good as my Radenso DS1. My DS1 has such a long detection range, you'll think something is wrong with it when it starts alerting, and it takes several miles to locate the law! The R4 has the same range and so far i love it!

This is the best RD i have ever owned. After running this I bought a Uniden R8 for our other vehicle.

I purchased Uniden R3 then after doing some research R4 is way superior, I used to have a radar back in a days Escort was top of the line then, Like the previous review says,I was about to purchase an R8 on ebay refurbished for $500 that $200 more just to have arrows . R4 has a long range ,downloaded R4 Companion app for an iPhone it will cost you $10 . But its worth it I don't have to mute my radar from my unit anymore. Ive been using it for 2 days now,I haven't seen cop yet. a radar isn't to drive recklessly ,it actually alerts you ,it actually reminds you to slow down. I am about to to do my hardwire in my corvette C8 Convertible. I need to but a bend mount kit that costs around $200

The R4 is all you really need. Alerts you more than a mile either direction . Does the job perfectly. No need to buy the most expensive detectors. Saved me so many times it paid for itself already

The range is exceptional. No arrows but works great.

Picked this up after researching this and other brands and for the value to price you get I’d recommend it to anyone looking for a radar detector. It had already saved me multiple times. I Wish that automatic doors and some vehicles didn’t give false K band readings but otherwise solid!

I love this radar. It warns me up upcoming speed traps from miles away. The furthest that I've seen was over 6 miles away. Wow...that's far. I recommend this Radar Detector for everyone.

WE LOVE THE UNIDEN RADAR DETECTOR. HAS SAVED ME MANY SPEEDING TICKETS.

This is a must have for anyone, around this price I would recommend either this or the r3 depending on if you want it to be more like and r7 or r8 without arrows, doesn’t break the bank like those two tho

The week or two of my commute it would go off a lot, but then it learned where the sources of false readings were and quieted down. It detects speed traps, and not just the ones you can see. It is very easy to set up and use.

greatest purchase ever Detection range 2-3 mile depending on terrain Super Accurate

Solid radar. Just as good as my valentine one radar. version one.

I had the r3 for a week and i could still hear the beeping even though i returned it, that's how much it used to beep over nothing. I got the R4, it's quit, didn't drive me insane over nothing, while it's not acop detector, duh. It actually works great in the moment, with highway radar, you can see 12 before the beeping which is great.