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With the perfect balance of affordability and capability, the RAD 390 represents our commitment to keeping drivers on the road protected wherever they go.
More range and coverage over previous generation for increased awareness
Unlocks quicker response times with higher sensitivity
Detects laser signals from both the front and rear of your vehicle
Power and data capable, comes with cable and 12V car adapter
With adjustable angle for more secure mounting
Ongoing firmware updates provide software support for improved longevity
Cobra’s RAD radar detector line is at the intersection of value and performance, built upon decades of radar detection expertise and customer-driven innovation. Every detector in the range delivers the essential protection drivers demand, from daily commutes to cross-country adventures.
Included with every new Cobra RAD 390:
With 7 parts & accessories available for Cobra RAD 390, customize your setup and be ready for any journey.
Find the information and product support you need all in one convenient location.
Item # 0180019-1
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Model Overview |
RAD 700iFlagship performance Cobra's top detector delivers maximum performance, AutoLearn intelligence, and convenient EZ Mag Mount |
RAD 490iLong range detection Newly enhanced with next-genration technology for up to 15% better performance over the previous generation. |
 THIS PRODUCT
RAD 390Essential protection Performance, reliability, and value you can count on. the perfect balance of affordability and capability. |
|---|---|---|---|
| LaserEye® Protection | Yes, Front and rear laser threat detection |
Yes, Front and rear laser threat detection |
Yes, Front and rear laser threat detection |
| Extreme Mode Capability | Yes |
Yes |
Yes |
| Display | Full-color OLED Display |
White OLED Display |
7-Segment LED |
| Power Connectivity | Barrel Connector |
USB-C |
USB-C |
| Mount Style | EZ Mag Mount™ |
Redesigned adhesive mount with installation film |
Redesigned adhesive mount with installation film |
| Digital Signal Processing | Yes |
Yes |
No |
| Drive Smarter® App | Yes |
Yes |
No |
| Defender® Database | Yes |
Yes *With Drive Smarter® App connected |
No |
| Shared Detector Alerts | Yes |
Yes *With Drive Smarter® App connected |
No |
| GPS-Based AutoLearn® Intelligence | Yes |
No |
No |
| Firmware Updatable | Yes |
Yes |
Yes |
| Dual-Language | Yes, English / Spanish |
Yes, English / Spanish |
Yes, English / Spanish |
Overall rating: 4.571429 / 5 from 21 reviews.
The Cobra RAD 390 radar detector offers outstanding value and performance. Its compact design is easy to mount and includes a USB C cord. The display is bright and easy to read, providing sharp visuals. Customers appreciate the long-range detection and confidence it offers on both highway and city drives.
Review topics: ["value","display","design","works","setup","instructions","features","detector","performance","installation","alerts","unit","device","option","radar","radar detector","button","system","plug","controls"].
"Just took out of the box to replace my other radar detector that I had for 23 years and followed all directions and downloaded the drive smarter app so I can download the latest firmware updates and of course the app cannot locate my device and this is super frustrating because now I cannot download anything to this device as it on its own don't have Bluetooth. Stay tuned for usage review as i start driving but so far 1 STAR."
"Have been using this for about a week now and it works great. My only problem would be the mounting system, it is an adhesive instead of suction cups meaning once it is placed there is no moving the base as opposed to being able to detach the suction cups as well."
"I’ve been really happy with the Cobra RAD 390. It was extremely easy to set up and use right out of the box, and the controls are straightforward without a bunch of unnecessary complexity. What I like most is that it gives me the alerts I need without constantly becoming a distraction while driving. The detection range has been impressive, giving me plenty of advance warning, and the display is bright and easy to read at a glance. It feels well-built, works consistently, and does exactly what I bought it to do. For the price, I think the RAD 390 offers a great combination of performance, simplicity, and value. Definitely a purchase I’m happy with and would recommend."
"Affordable yet very reliable. This is a great quality radar and very easy to set up. The compact design doesn’t take up much room on the dashboard either. Setup was straightforward, and the controls are easy to understand once you get familiar with them. Overall, it’s a useful little device and I like having the extra awareness while driving. Get this you won’t be disappointed!"
"Really like the small size of the unit and the USB-C so any like cord can be substituted in a pinch. Easily movable to another vehicle or rental for travelers. Enough warning to prepare for gradual speed adjustments and quick mute option. Great holiday gift for family members who need a little help."
"The Cobra RAD 390 is a simple and easy-to-use device that has all of the features I need in a radar detector. It came with easy-to-follow instructions and all the tools I needed to get it easily mounted and setup in my car, and has worked perfectly since day 1. Definitely a great value for the price!"
"Haven’t used a detector for 30 years since the law demanded that they were banned from semi trucks. Had a Cobra then and decided to go with another today because I bought a late model Mustang and I suffer with a heavy foot. If it keeps me out of trouble then I’ll be forever grateful. The only problem I have with it is that the power plug is very short and the outlet is deep. It’s impossible for me to grab it with my fingers and unplug it so it is always going to draw power even if it turned off. Not cool."
"This is a great radar for highway driving. Has current technology and has updatable firmware. Provides both visual LED alerts and audible alerts. I like that it’s a simple plug-and-play I can grab and get on the highway. Also good around town if you’re in a strict enforcement neighborhood. Cobra has done me right over the years."
"Doesn't have a city and highway button. K band keeps going off while in city because of automatic doors on stores. Had to turn K band completely off in city to stop the false alarms"
"Compact little unit, easy to mount with adhesive and includes USB C cord plus lighter plug adapter . Works well with various settings including a sensitivity selection to filter out unwanted warnings. It's got a volume control on the side to set the volume for your warnings. There's also an Extreme mode that will warn you for everything. Great for when you're moving down a highway and the man is hiding in the bushes."
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