Samurai Japan Relay Attack Prevention Key Case : Radio wave blocking technology
Available Options
Set of 2
Joom
$31.48
Available to order
"Just pop your key in, and it's shielded." That's the simple promise of the Fogman Relay Attack Prevention Key Case. This little gadget tackles a modern menace: relay attacks, where thieves amplify your key fob's signal to unlock and start your car from a distance—no breaking in required. By blocking those sneaky radio waves, it keeps your vehicle secure even when your key is chilling on a table inside your house. Perfect for anyone with a keyless entry system, it's dead easy to use. Slip your key into the case, and it does the rest, cutting off external signals automatically. Beyond security, it offers peace of mind for daily life, whether you're parked on a busy street or overnight in your driveway. Built tough with durable materials, the set includes two cases—handy for multiple keys or sharing with the family. It's a smart, no-fuss upgrade to your anti-theft toolkit.
- Anti-theft protection
- Set of two cases
- Smart key compatibility
- Compact and portable design
- Radio wave blocking technology
General specs
- Brand: Samurai Japan
- Model: Relay Attack Prevention Key Case
- Seller: Joom
- Function: Radio wave blocking, Relay attack prevention
- Compatibility: Smart keys, Keyless entry systems
- Contents: Set of 2 cases
- First listed by seller: 8/24/25
If you are interested in more details, you can find full information on the seller's page.
View on seller's site
#publicidad
$31.48
Last price update: 8/24/25
Available to order
Shipping options
Delivery to 
United States
United States
Unavailable
Comparison with similar products
| This item | Recommendations | |||||
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Samurai Japan Relay Attack Prevention Key Case Radio wave blocking technology
|
Samurai Japan Smart Key 0.3 second storage access
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Smart Key Case for Relay Attack Prevention Blocks radio waves for security
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Car Key Signal Blocker Blocks radio wave relay attacks
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BrightonNET BC-RRATKEY-CB Blocks radio signals to prevent relay attacks
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Smart Key Case Shockproof protection for keys
|
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| Brand | Samurai Japan | Samurai Japan | LIBO | SAMURAI STYLE | BrightonNET | Samurai Japan |
| Model | Relay Attack Prevention Key Case | Smart Key | BC-RRATKEY-CB | |||
| Color | ||||||
| Rating |
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| Price | $31.48 | $83.83 | $58.84 | $67.00 | $47.91 | $36.65 |
| Seller | Joom | Joom | Joom | Joom | Joom | Joom |
| Update | August 22, 2025 | August 22, 2025 | August 23, 2025 | August 31, 2025 | August 27, 2025 | August 25, 2025 |
| Function | Radio wave blocking, Relay attack prevention | Radio wave blocking | Radio wave blocking, Prevents relay attacks | Radio signal blocking, Relay attack prevention | ||
| Compatibility | Smart keys, Keyless entry systems | Most key fobs | Works with most key fobs | Smart keys, Key cards | Volkswagen smart keys | |
| Material | Faraday cage material | 3D carbon fiber | Durable, scratch-resistant material | |||
Relay Attack Prevention Key Case
$31.48
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Manon V.
Lille
September 2, 2025
As a mom with kids, car security is a big deal for me, especially with keyless entry making things too easy for thieves. I bought this hoping for a simple solution, and it does work—pop the key in, and it's supposed to shield it. But honestly, it's not top-notch. The size is a hassle; my key feels huge now, and I have to remember to use it every time, which is a pain. I've used it for a couple of weeks, and while it hasn't failed yet, I'm not fully confident. For the price, I expected something more seamless and foolproof. It's okay, but not great—I might look for better options if this one doesn't hold up over time.
- Pros: It does block signals as promised, which is a relief for preventing car thefts without any effort. The case feels sturdy and having two in the set is handy for our family's multiple keys.
- Cons: The case is bulky and makes my key harder to carry in a pocket or small bag, which is annoying daily. From what I feel, it doesn't always seal perfectly, and I worry it might not block signals reliably in all situations, making me second-guess its effectiveness.