SAMURAI STYLE Car Key Signal Blocker: Blocks radio wave relay attacks
Available Options
There’s a simple way to stop car thieves from cloning your key fob: pop it into a signal blocker. Relay attacks are the new hotness for auto theft—crooks use gadgets to boost and snag your key’s radio waves, letting them waltz right into your ride and drive off. This blocker creates a tiny Faraday cage, blocking all signals from escaping or entering, so your key stays silent and secure.
Built from tough 3D carbon fiber, it’s not just functional; it’s sleek enough to blend in on a desk or in a pocket. Compact and portable, it’s your go-to for home, office, or travel. Slip your keys inside, and you’ve just upgraded your car’s defense against electronic heists—no sweat, just solid peace of mind.
- Prevents car theft via key cloning
- Durable 3D carbon fiber construction
- Japanese-inspired design
- Easy to use and portable
- Blocks radio wave relay attacks
General specs
- Brand: SAMURAI STYLE
- Seller: Joom
- Material: 3D carbon fiber
- Function: Radio wave blocking, Prevents relay attacks
- Design: Japanese-inspired
- Compatibility: Works with most key fobs
- First listed by seller: 9/1/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
United States
Video Reviews
Comparison with similar products
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Smart Key Case for Relay Attack Prevention Blocks radio waves for security
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| Brand | SAMURAI STYLE | LIBO | Samurai Japan | BrightonNET | nicoJAPAN | Daily Home Furnishings |
| Model | Relay Attack Prevention Key Case | BC-RRATKEY-CB | Signa Lock Relay | |||
| Color | ||||||
| Rating |
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| Price | $65.34 | $57.39 | $30.70 | $46.73 | $40.22 | $414.27 |
| Seller | Joom | Joom | Joom | Joom | Joom | Joom |
| Update | August 31, 2025 | August 23, 2025 | August 22, 2025 | August 27, 2025 | August 25, 2025 | August 19, 2025 |
| Function | Radio wave blocking, Prevents relay attacks | Radio wave blocking | Radio wave blocking, Relay attack prevention | Radio signal blocking, Relay attack prevention | ||
| Compatibility | Works with most key fobs | Most key fobs | Smart keys, Keyless entry systems | Smart keys, Key cards | ||
Car Key Signal Blocker
Mia M.
Cardiff
September 14, 2025
As a driver on a budget I bought this to protect my car from those relay attacks I heard about it saved my bacon a few times when I left my keys near the door but honestly it's not perfect I have to remember to use it every time and it can be a hassle compared to just tossing keys in a drawer I read about other options but this one was available and does the job fairly well though I might look for something cheaper or more convenient in the future for now it's an okay hack but not a game-changer
- Pros: It arrived on time and looks fairly sleek blending in on my desk or in my pocket the carbon fiber feels tough and it does block signals well giving me some peace of mind against theft attempts
- Cons: It's a bit bulky for my keychain and most likely won't fit all my keys easily also the price felt high for what it is and I wish it had a simpler design for daily use