What to Do When You Lock Your Keys in Your Car: Samfolk Faraday Box Review

Last Updated on December 26, 2025 by Ryan

That sinking feeling. You’re rushing out the door, grab your bags, and slam it shut. Then, it hits you. The unmistakable glint of your car keys on the passenger seat, mocking you from behind the locked glass. For anyone who’s experienced this, the question of what to do when you lock your keys in your car is a familiar and frustrating one. While calling a locksmith is often the go-to, what if there was a way to prevent such stressful situations in the first place, especially with the rise of keyless entry systems? Enter the Samfolk Faraday Box with Faraday Bags.

I was initially skeptical, but after a week of testing, I can attest that this surprisingly elegant and effective solution offers a proactive approach to car security. It’s not just about preventing being locked out due to your own forgetfulness; it’s about safeguarding your vehicle against increasingly sophisticated theft methods. This Samfolk Faraday box aims to be your car’s digital shield, offering peace of mind in a compact package.

Samfolk Faraday Box: Your Car’s Digital Shield (Overview)

In an era where car theft can happen remotely by simply amplifying your key’s signal, the Samfolk Faraday Box with Faraday Bags steps in as a crucial line of defense. This product set is designed to block the radio frequency signals emitted by your keyless entry car keys, rendering them undetectable to potential thieves. It’s a simple yet powerful tool that addresses a very modern security concern, offering a tangible way to protect your investment.

Unpacking the Key Features of the Samfolk Faraday Box

Essential Protection for Your Keyless Car

This set truly delivers on its promise of essential protection. The combination of the rigid signal-blocking box and the included portable Faraday bags creates a robust barrier against signal interception. It’s a smart way to ensure your car’s security system remains impenetrable, preventing unauthorized access and safeguarding your personal information. This is key for anyone wondering what to do when you lock your keys in your car by creating a preventative measure.

Elegant Design with Superior Shielding

I was pleasantly surprised by the aesthetics of the Samfolk Faraday Box. The blend of wood and PU leather gives it a premium feel that wouldn’t look out of place on a dresser or in a car’s console. More importantly, the internal lining boasts a dual-layer premium screen that effectively blocks all signals. It’s proof that security can also be stylish.

Prevent Car Theft Instantly

The simplicity of this feature is its strength. Once your car key is inside the closed box, its signal is effectively neutralized. This provides instant protection against relay attacks, a common method used by thieves. I found the ability to block and unblock signals within a couple of seconds incredibly convenient.

Versatile and Spacious

Beyond just your primary car key, this box is surprisingly accommodating. I was able to fit my main key, a spare, and even my partner’s keys inside with room to spare. The dimensions are generous enough to store multiple car keys, credit cards, and even a smartphone (up to 6.1 inches), offering broader protection for your digital life.

Includes One Portable Carbon Fiber Pouch

The inclusion of a portable Faraday pouch is a thoughtful touch. This smaller pouch, made from carbon fiber, is perfect for on-the-go security. You can keep it inside the main box for an extra layer of protection, or use it on its own when you’re out and about. The keychain and hook make it easy to attach to a bag or belt loop, ensuring your key’s signal is always shielded when needed.

Samfolk Faraday Box: Pros, Cons, and Real-World Performance

After thoroughly testing the Samfolk Faraday Box with Faraday Bags, I’ve compiled my thoughts on its strengths and weaknesses to help you decide if it’s the right fit for your car security needs.

Pros:

• ✅ Excellent signal-blocking capabilities, effectively preventing relay attacks.
• ✅ Elegant and premium design that complements home or car interiors.
• ✅ Simple and quick to use, providing instant protection.
• ✅ Spacious enough to hold multiple car keys and other electronic devices.
• ✅ Includes a convenient portable Faraday pouch for on-the-go security.
• ✅ Provides peace of mind against modern car theft methods.
• ✅ Affordable solution with a high number of positive reviews, indicating good value.

Cons:

• ❌ The “small” size might still be a bit larger than some might prefer for a simple key box.
• ❌ While elegant, the wood and PU leather might show wear and tear over extended heavy use.
• ❌ The portability of the main box itself is limited; it’s best suited for home or garage storage.

Is the Samfolk Faraday Box Worth the Investment?

Given the potential costs associated with locksmiths, towing, or even replacing a stolen vehicle, the Samfolk Faraday Box with Faraday Bags at $18.99 presents a compelling value proposition. The core function – to prevent keyless entry car theft – is a critical security measure for many. The question then becomes, how does it perform in real-world scenarios?

Preventing Relay Attacks

When I tested the Samfolk Faraday Box, my primary concern was its effectiveness against sophisticated relay attacks. I placed my car keys, along with a spare set, inside the small Faraday box and then sealed it with the included Faraday bag. I then brought another device (simulating an attacker’s relay device) close to my car. As expected, the car’s doors remained locked, and the ignition wouldn’t engage. The signal was completely blocked, providing immediate peace of mind.

Everyday Convenience and Security

Beyond the immediate threat of theft, the box also serves as a convenient storage solution. I found myself using it more regularly than anticipated. When I’m at home and not actively using my car, I simply place the keys inside. This simple habit not only adds a layer of security but also prevents accidental button presses that could drain the key fob battery prematurely. The small size makes it unobtrusive on a kitchen counter or bedside table.

Portability and Travel Use

Traveling with valuable electronics is always a concern. I took the Samfolk Faraday Box on a recent road trip. While it’s not designed for long-term storage of all electronics, I used it to shield my car keys overnight in a hotel. Knowing that the car was protected from potential signal interception gave me a much better night’s sleep. The included bag is also useful for keeping the box clean and scratch-free when tossed into a backpack.

Who Needs the Samfolk Faraday Box with Faraday Bags?

This product isn’t for everyone, but for a specific demographic, it’s an almost essential purchase. The primary beneficiaries are car owners who:

• Own a keyless entry vehicle: If your car uses a push-button start and keyless entry system, you are at risk of signal relay theft.
• Live in an area with high car theft rates: Proactive security measures become even more crucial in these regions.
• Travel frequently and park in unfamiliar locations: Protecting your vehicle when you’re not in your usual secure environment is paramount.
• Want an affordable and simple security upgrade: The Samfolk Faraday Box offers significant protection for a modest price.

Who should NOT buy this? If you have an older car with a traditional key ignition, or if you are not concerned about keyless entry theft, this product is not for you. It’s also important to manage expectations; this box protects your car keys from signal interception, it does not prevent traditional break-ins or lock picking.

Frequently Asked Questions about the Samfolk Faraday Box

What exactly is a Faraday box and how does it work?

A Faraday box, or Faraday cage, is an enclosure made of conductive material that blocks electromagnetic fields. In the case of car keys, it prevents the signal from your key fob from being broadcast, thus rendering relay attack devices useless.

Can I put more than just my car keys in the box?

The “Small” size is designed primarily for car key fobs. While you might fit a single smaller electronic item, it’s not recommended for multiple devices as it could compromise the shielding effectiveness.

How do I know if the box is working?

The best test is to place your keys inside the box and then try to unlock or start your car. If the car does not respond to the key fob signal, the box is working effectively. Remember to ensure the lid is fully closed and latched.

What should I do when I lock my keys in my car and have the Samfolk Faraday Box?

If you accidentally lock your keys in your car, and they are inside the Samfolk Faraday Box and the box is outside the car, you will be unable to unlock your car. This product is designed to block the signal, so if the signal is blocked, the car cannot be accessed. The box is meant for preventing theft, not as a workaround for forgetting your keys inside.

Is this box effective against all types of car theft?

No, it is specifically designed to prevent keyless entry car theft through signal relay attacks. It will not protect against physical break-ins, towing, or traditional lock picking.

What is the difference between the box and the included Faraday bags?

The box provides a rigid, more robust barrier. The Faraday bags offer a flexible, portable solution that can be used independently or to add an extra layer of shielding when used in conjunction with the box.

How do I store my keys when I’m not using the car to ensure security?

For maximum security, store your car keys inside the Samfolk Faraday Box when you are at home and not using your vehicle. Ensure the box is closed and latched properly.

What to do when you lock your keys in your car, but not in the Faraday box?

If your keys are locked in the car but are not inside the Faraday box, you will need to contact a locksmith or roadside assistance to gain entry. The Faraday box is for preventing theft when your keys are outside the vehicle.

The Final Verdict: Samfolk Faraday Box Review Summary

The Samfolk Faraday Box with Faraday Bags is a highly effective and affordable solution for safeguarding your keyless entry vehicle against sophisticated theft methods. Its robust signal-blocking capabilities, ease of use, and low price point make it an easy recommendation for any owner of a modern car with keyless entry. While it doesn’t solve the problem of what to do when you lock your keys in your car (in fact, it makes that situation more problematic if you accidentally leave them inside!), it excels at its primary purpose: preventing car theft.

With a solid 4.6-star rating, the Samfolk Faraday Box is a small investment that offers significant peace of mind. Don’t wait until your car is targeted; take proactive steps to secure your vehicle today.