Cobra SPX-5400 R/B

Ultra-High Performance Radar/Laser Detector


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This item has been discontinued

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General Features:

  • Factory Refurbished to Like New Condition*

    • 360° 14 Band Radar/Laser Detector/Jammer
    • Icon Display lights up to indicate detection
    • Undetectable by Spectre 1 and VG-2 radars
    • Protection against Pop radar and laser recognition
    • Dark/Night Mode dims the display brightness
    • Audible alerts provide a verbal identification of the detected band
    • Safety Alert warns drivers of emergency vehicles and road hazards from systems with equipped Safety Alert transmitters
    • City and Highway modes reduce false alerts in densely populated areas
    • Digital signal strength meter provides relative proximity to the target
    • Compact design ensures an unobstructed road view for drivers
    • Installs on the windshield
    • Includes all the mounting hardware
    • Authorized Internet Dealer
    • 90 Day Sonic Electronix Warranty

    Due to state laws, Sonic Electronix, Inc can not ship radar detectors to Virginia or the District of Columbia.

    *Neither SonicElectronix nor Cobra keep record of "why" a specific product had to be refurbished. Often the case, the 'issue' ranges from User Error to Malfunctioning Vanity Features

    Product Features

    Number of Modes
    This number indicates how many modes the radar detector can be set at. Most detectors will include a city and highway mode. More advanced radar/laser detectors will offer more modes to suit your needs.
    Dark Mode
    Dark mode is a brightness option. Unless there is an alert, the unit will be completely dark.
    Voice Alerts
    The feature designates if the unit uses voice alerts. Voice alerts will audibly alert the driver of various warnings.
    Auto Mute
    The auto mute function will conveniently mute the alert tone when the alert lasts for an extended period of time. This is for the drivers convenience during extended encounters.
    Auto Shut Off
    A convenient feature that turns off the unit when the ignition is turned off.

    Product Specifications

    Radar Display
    The type of display that the radar detector has.

    LED Displays: Tells the driver what he or she needs to know through a bright LED display.

    LED Icon Indicators: Tells the driver what he or she needs to know by illuminating icons and symbols.

    Text Display: Tells the driver what he or she needs to know by illuminating text on the display.

    LED Icon Indicators
    Signal Strength Meter
    This feature means that the unit displays that strength of the received signal.
    Brightness Control
    If the brightness of the unit can be conveniently adjusted and controlled, it will be listed here.
    Turn-on/off Select Bands
    Many radar detectors can detect many different bands of signal. This feature designates if the user can select what bands he or she has on or off.
    Unit Mounting
    Different radar detector are attached to the vehicle in different ways. The most common is for it to be suction-cupped to the windshield. This allows the unit to be moved from one vehicle to another with ease. Another mounting option is called remote-mounting. A remote mount unit is directly installed into your vehicle.

    Other ways to mount your radar detector include Velcro and adhesive.

    Suction cups
    Power Source
    The power source is the method in which the unit receives power. Some units will be powered by batteries, while others will need to be plugged in to an AC or DC power source.
    12V DC Car Adapter
    Direct Power Accessory
    If there is an optional accessory to the unit that will provide power, it will be listed here.
    Travel Case Included
    If a protective travel case is included, it will be listed here.


    Number of Detected Bands
    This number indicates the number of bands the radar/laser detector protects against. The term band includes different radars, lasers, and safety signals, among others. The higher the number, the greater the protection.
    X Band
    X Band is a frequency used for detecting speed from a police radar.
    K Band
    K Band is the most popular radar frequency band that is used today. It is able to detect speeds from a stand still location, or from a moving vehicle
    Ka Band
    Ka Band operates within the frequencies 26.5-40 GHz. This is the newest introduced radar band and it is becoming more and more popular. It rarely has a false alert.
    Ku Band
    Ku band ranges from 12-18 GHz when used in radar applications.
    This feature specifies if the unit will detect lasers.
    VG-2 Immunity
    The VG-2 detects radar detectors. Radar detectors with VG-2 immunity will be immune to the VG-2 radar and alert the driver when they are under such surveillance.
    Pop Alert
    Some radar guns operate in a POP mode so they can get a speed reading of a target vehicle extremely fast, resulting in most radar detectors not being able to consistently signal an alert. There are very few radar guns in service in the U.S. capable of POP mode operation. If your radar detector is Pop Alert capable, you may notice an increase in Ka-band false alerts when POP mode radar detection is switched on.

    Specials with this Item

    Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

    Warranty and Return Policy

    Parts Warranty Duration
    90 days
    Labor Warranty Duration
    90 days
    Warranty Provider
    Sonic Electronix

    Summary of Customer Ratings & Reviews

    Rating Distribution

    5 Star
    4 Star
    3 Star
    2 Star
    1 Star

    Average Attribution Rating



    cobra spx 5400R/B

    October 10, 2016

    el producto es muy bueno y quede conforme con la compra .

    0 of 0 found this helpful

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    What is specter alert?
    A shopper on Apr 4, 2015
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    Product Summary


    Model Number






    Internal SKU


    Internal Product ID


    Sonic Electronix Wiring Guide

    Wiring Diagram Legend

    Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

    Product Name: Cobra SPX-5400 R/B

    Item Added to Cart

    Cobra SPX-5400 R/B

    Ultra-High Performance Radar/Laser Detector


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