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Uniden
Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna

Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna

Best price now

$39.99at WalmartChecked 1 h ago

20% under what the other stores charge

Compared across 10 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $39.99 at Walmart (checked Nov 10, 2026).
  • Checked at 10 stores.

Our take on the Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna

The Uniden 18-In. Magnetic-Mount CB Antenna is a short, pre-tuned whip that sticks to a metal roof or trunk lid and needs no tuning out of the box. It handles up to 100 watts, uses a standard 50-ohm CB impedance and is rated at roughly 1 to 2 dBi gain. The short length keeps it out of garages and drive-throughs, but it gives up range and signal strength next to taller whip or center-load antennas. It suits casual CB users, temporary setups and small vehicles more than long-haul operators who need maximum reach.

Best forCasual CB users and short tripsTemporary or removable setupsSmall cars and trucks with limited roof spaceBuyers who want no tuning or wiring work
Pros
  • Pre-tuned, so no SWR adjustment needed on install
  • Magnetic base moves between vehicles in seconds
  • 18-inch whip clears garages, car washes and drive-throughs
  • Handles up to 100 watts, enough for most stock and many amplified CBs
  • Standard 50-ohm CB impedance works with common radios
Cons
  • Short whip limits range compared with taller antennas
  • Magnet mount can shift or scratch paint at speed or in wind
  • Low gain of about 1 to 2 dBi is modest for highway use
  • Coax length and connector type limit where it can reach

Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna prices at every store

  • WalmartNew

    In stock

    $39.99Checked 1 h ago
    Visit Walmart
  • Home DepotNew

    In stock

    $39.99Checked 1 h ago
    Visit Home Depot
  • Uniden America CorporationNew

    In stock

    $49.99Checked 1 h ago
    Visit Uniden America Corporation
  • Best BuyNew

    In stock

    $49.99Checked 1 h ago
    Visit Best Buy
  • eBayNew

    In stockSold by diddlydealsllc

    $49.99Checked 1 h ago
    Visit eBay
  • Northern ToolNew

    In stock

    $49.99Checked 1 h ago
    Visit Northern Tool
  • Police Scanner Online StoreNew

    In stock

    $49.99Checked 1 h ago
    Visit Police Scanner Online Store
  • Verdi.comNew

    In stock

    $49.99Checked 1 h ago
    Visit Verdi.com
  • TargetNew

    In stock

    $51.99Checked 1 h ago
    Visit Target
  • StaplesNew

    In stock

    $57.99Checked 1 h ago
    Visit Staples

Store links may earn us a commission.

Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna price history

Lowest price we've seen: $39.99 on Nov 10 at Walmart. Tracked across 10 stores since Nov 10.

What reviewers say

Owners of short magnetic CB antennas like this one tend to praise the quick, tool-free setup and the low profile. They commonly note that range and clarity fall short of taller antennas, especially at highway distance.

What people mention
  • SetupPraisedOwners say it goes on and works without tuning or tools.
  • RangeCriticisedUsers report shorter reach than taller whip or center-load antennas.
  • Mount gripMixedThe magnet holds on normal driving but can shift in strong wind or at speed.
  • SizePraisedThe 18-inch whip clears garages and drive-throughs where tall antennas hit.

Specifications

Antenna Type
CB Radio Antenna
Antenna Gain
1 dBi to 2 dBi
Antenna Frequency Band
CB
Antenna Highlights
Pre-Tuned
Installation Location
On vehicle
Mount Type
Magnetic-Mount
Typical Users
Unisex, Adult

Questions and answers

Do I need to tune this antenna?
No. It is pre-tuned for the CB band, so you can mount it and connect it to a 50-ohm CB radio without adjusting SWR.
Will it work with any CB radio?
It works with standard 50-ohm CB radios and handles up to 100 watts, which covers stock radios and many amplified ones.
How is it better or worse than a taller whip antenna?
It is easier to mount and clears low spaces, but its short length and low gain give less range and weaker signals at distance.
Where should I mount it?
On a flat metal surface such as the roof or trunk lid, with the coax routed inside through a door or window seal.
Does the magnet damage paint?
The magnet itself is generally safe, but grit trapped under the base can scratch the paint, so clean the surface before mounting.
What is in the box?
The antenna with its magnetic base and attached coax cable; check the connector type matches your radio.
Where is the Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna cheapest?
At Walmart, for $39.99, 20% under what the other stores charge, as of our latest check.
Where can I buy the Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna?
10 stores we checked sell it, including Walmart, Home Depot, Uniden America Corporation, Best Buy, eBay.

Stores we've priced the Uniden 18-In. Magnetic-Mount Pre-Tuned CB Antenna at

  • Best Buy deals and prices
  • Home Depot deals and prices
  • Northern Tool deals and prices
  • staples.com deals and prices
  • Target deals and prices
  • Verdi.com deals and prices
  • Walmart deals and prices

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Dimensions
18 in
Weight
18 g (parcel dimensions)
Power Source
No batteries required, Corded Electric
Impedance
50 ohms
Wattage
100-watt power handling rating