Uniden R4W (new Model) Extreme Long-Range Laser/Radar Detector, Record Shattering Performance, 360° Awareness, Built-in GPS, Wi-Fi, Bluetooth, Voice Alerts, Red Light & Speed Cameras, R/TACH App
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Availability:
In Stock.
Arrives
Thursday, Jul 23
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Features
- The new R4w continues Unidens tradition of leading innovation. featuring Extreme Long-Range Record Shattering Performance, Blackfin DSP (Digital Signal Processor), with visual and voice alerts on an color OLED display. Also, Wi-Fi, Bluetooth, GPS, R/TACH app support, and our Speed and Red-Light database included.
- BUILT-IN GPS WITH AUTO MUTE MEMORY - The R4w can remember and automatically mute false alerts (such as retail store door alarm), along your routes so you never have to listen to the same false alert twice.
- MULTI-COLOR OLED DISPLAY - An easy-to-read display allows for more useful information to be displayed at once, improving your overall situational awareness.
- VOICE ALERTS - Voice alerts provide clear communication allowing for hands-free operation. Voice alerts are programmable to fit your style so you can keep your eyes on the road with no distractions.
- ADVANCED K/KA BAND FILTERING - The R4w has the best K/KA Band filtering resulting in fewer false alerts from blind-spot monitoring and collision avoidance systems.
Description
The R4w radar/laser detector continues Uniden’s tradition of leading innovation. Featuring extreme long-range performance, a Blackfin® DSP (Digital Signal Processor), and visual and voice alerts on an OLED display. Also, Wi- Fi, Bluetooth, GPS, R/TACH app support, and our speed and red-light database, etc. With our exclusive proprietary technology, the R4W number one feature is unparalleled performance. Also, the R4w features Auto Learn which greatly reduces false alerts over time giving you the quietest ride. When you need the best, and none of the fluff, Uniden’s R4w puts you miles ahead.
Brand: Uniden
Compatible Devices: Smartphone, iPhone
Frequency Bands Supported: Ka, K, X
Power Source: Corded Electric
Display Type: OLED
Voltage: 12 Volts (DC)
Product Dimensions: 4.5"L x 2.8"W x 1.1"H
Number of Items: 1
UPC:
Unit Count: 1.0 Count
Compatible Devices: Smartphone, iPhone
Frequency Bands Supported: Ka, K, X
Power Source: Corded Electric
Display Type: OLED
Voltage: 12 Volts (DC)
Item Dimensions L x W x H: 4.5"L x 2.8"W x 1.1"H
Brand: Uniden
UPC: 050633600665
Model Number: R4w
Mfr Part Number: R4w
Unit Count: 1.0 Count
Manufacturer: Uniden
Warranty Description: 1 year
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 23
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Update: its been over 6 months and its still great. I thought I'd share that shortly after my review, I switched to using an aftermarket rj11 to usb-c cord, as I needed more usb ports and switched to a 12v usb adapter (and only one 12v/cigarette lighter port). I've noticed people having issues when switching over to a set-up like this, and they either blame the cable, or the device itself. The first 12v adapter i got, while it was highly rated, it was only 90w. It wasn't enough power to start both my dash cam and radar detector at the same time when I started the car. I'd have to unplug the radar detector, then plug back in, for it to power on. It functioned properly, it was just the initial powering on that was affected. If I left the dash cam unplugged and started the car with only the radar detector plugged in, it powered on as normal. That led me to believe there just wasn't enough power going to it at startup, due to other devices pulling power as well, and I was right. I switched to a 3 port, 230w adapter (from here on amazon, it has 2 usb-c ports, and 1 usb-a port), and its been perfect ever since. No functionality issues whatsoever. For reference, I have this radar detector, dash cam, and a wireless charger plugged into it (usb-a). Hope this update helps!! ---------------------- Great radar detector! Its reliable, durable, can hear it over loud music. I also have my dash cam plugged into the usb port of its power cord, and both devices work perfectly sharing the power source. Only time this radar detector doesn't work is when going thru this one area while on the highway, a certain police unit turns their radars off and clocks people!! 😂😒 There have been SEVERAL times the Ka band was going off and I'm looking like "where is this cop" for what seems like a while, and eventually I see them. Definitely long enough range for a suitable warning!! And it sure does pick up everything: speed cameras, those speed radar signs, traffic light cameras, etc. It's really easy to hit "mute" for these things, and it automatically does a "mute memory" so u don't have to listen to it every time passing the same spot. It is also easy to remove mute memory by hitting "mute" again the next time you pass the same spot. I was actually intimidated by the manual and all the settings at first. However, I've left it on the default "highway" and it's all good. All I ever needed to touch is volume buttons and mute/dim button, which were easy enough to learn just by simply pressing them. And also going into menu to set up wifi/bt if u install the app, which wasn't that bad, just a lot of scrolling to the actual setting. Another note, for first time radar detector users, if you get hit with the "laser," that's not a warning, its a statement. Yep, I got that statement, more than once. I was lucky to be going just 80 the first time, and remembered the area when passing thru again. (Watch out in some areas of GA!) I live in FL and travel the entire southeast for work, so far I've only seen "laser" on I-475 (I think it was). Hope this helps!
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Reviewed in the United States on May 2, 2025 by Shopaholic
Great detector. Has saved me many times. Programmable via the phone. Well worth the price.
Reviewed in the United States on May 11, 2026 by I bought that
This thing works great and is easy to set up and use. Not cheap, but definitely worth it!
Reviewed in the United States on June 8, 2026 by Greg_amazon_fan
EXCELLENT RANGE!!! Well worth it!!!
Reviewed in the United States on June 3, 2026 by Eric Ruvalcaba
The quality of this radar detector is very accurate, the features are awesome Hasn’t let me down yet, it is very sensitive, I love how you can change the brightness of the color and it is very reliable.I have dropped it several times and it’s fell off my windshield a couple times and never has broken. I like how you can go in your phone and change the settings and you can change it from professional mode to standard mode. I highly recommend.
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Reviewed in the United States on January 31, 2026 by Christina
Works great it's already paid for itself, I previously had the cobra 480i which was just as good, the uniden r4w just better by the fact it actually tells you where speed cameras are and distance from it, also the mute memory is awesome I pass the same radar speed signs on a daily basis to and from work muting those and not having to hear alerts every time is nice. As far as distance from police radar and Lazer is exactly the same on both so if your looking for cheaper and good I definitely recommend the cobra 480i but if you want good city and highway alerts that are accurate the the r4w is better, thecobra pics up everything in the city and is constantly going off, I didn't use it in the city I just turned it off only used on the highway
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Reviewed in the United States on May 8, 2026 by Jack
Great radar, but uniden need to get with the times and include the usb-c cord for there power cord. Most new cars don’t even have the old DC plugs
Reviewed in the United States on May 10, 2026 by Conor U
This things works amazingly and is also very easy to set up (took like 2 minutes including the cleaning of window), also heard it’s better then the r7 that’s has arrows due to the r4w having a longer range. Although the r7 does have 360 range detection (with the arrow also) I have haven’t found myself needing to worry (as i look in in my rear view mirror doing a pull…).I have it set to highway mode due to the many trees I have in my area and gives me a 30 second warning minimum in dense areas (although on the highway I have not tired it since I have had no chance to take it on the highway but I expect it to work phenomenal for the highway, with more anticipation when the radar comes on).There was one incident where a officer that was coming out of a neighborhood that did not respond to my detector at all (i think they must have not had their radar off and only happen one time and looked like the office was looking at a laptop ngl) and multiple incidents were I have had ka band warn me in dense areas in highway mode from left, front or right of me with and gave me 30 second warning minimum. Definitely saved me from some ticket lol.
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Reviewed in the United States on August 21, 2025 by Josh