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
Monday, May 11
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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
UPC:
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
Manufacturer: Uniden
Warranty Description: 1 year
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, May 11
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
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
Ridiculously pleased here...this thing has incredible range and once you have driven around enough, it learns where the false signals are and just gets quiet... almost scary quiet. Like any tool, you will need to do some experimenting and learn how to use it. I HIGHLY recommend checking out vortexradar website, they not only link to here but also give A LOT of techy info on how to properly set this unit up, including frequencies and ranges you can safely block to weed out blind spot radar on passing cars. There is simply so much this thing does that even an expert needs their guide on what to turn on and off, depending on your location and what type of radar is used where you are (they provide that info as well). Quality unit, no false alarms after driving with it a while, everything about this thing is awesome once you are used to it.
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Reviewed in the United States on November 16, 2025 by Guy in Pennsylvania
This is a great rate of detector mostly because of its range it catches contacts from very far away also blocks a lot of stuff so you don't get false positives
Reviewed in the United States on March 29, 2026 by Juan Rivera
Got 3 tickets in one week before this and it works! There is countless settings but it is alerting every time when a store with a sliding door is nearby which is annoying.
Reviewed in the United States on March 22, 2026 by Hayes
Great value for your money. You can pay a few hundred dollars more for arrows to tell you which direction they’re in or you could just look around. Up to you.
Reviewed in the United States on April 12, 2026 by dlumh
This radar detector is great I finally got it. It works perfectly. The quality is great mounting is easy connects really fast to Wi-Fi and Bluetooth. Give early warnings its the best.
Reviewed in the United States on April 2, 2026 by Sunny
The first day I used this radar detector it saved me from 3 tickets. Sound quality is great and adjustable. Easy to setup. Suction cup has a strong hold. Not budging at all. Price is a little steep but you get what you pay for it.
Reviewed in the United States on March 10, 2026 by Tory