What is juice jacking?
Juice jacking is a cyberattack where criminals compromise public USB charging stations to steal data or install malware on your device. When you plug into a USB port, you're connecting to both power and data lines — and a compromised port can exploit that connection in seconds.
The FBI and FCC have both issued public warnings about juice jacking at airports, hotels, shopping centres, and public transport hubs. The attack is silent — no prompts, no warnings. Your photos, messages, passwords, and files can be copied while you think you're just charging.
A USB data blocker is the only physical guarantee that data transfer is impossible. Software can be bypassed. This can't.
How it works
USB cables have four pins: two for power (5V and ground) and two for data (D+ and D-). A data blocker physically disconnects the data pins while maintaining the power connection.
This means:
• Power flows through normally — your device charges
• Data pins are not connected — no information can transfer
• No software involved — nothing to hack, bypass, or disable
The Data Blocker Pro 3.0 supports bi-directional power flow, so it works whether you connect it to your charger or your device. USB-C on both ends — male connector on one side, female on the other.
When to use it
• Airport charging stations — high-traffic, high-risk targets
• Hotel USB ports — built into lamps, alarm clocks, desks
• Rental cars — USB ports in unfamiliar vehicles
• Conference venues — public charging at events
• Cafes and co-working spaces — shared infrastructure
• Any USB port you don't own — if you didn't install it, don't trust it
Specifications
Connector type: USB-C male to USB-C female
Power delivery: Bi-directional, standard USB charging speeds
Data transfer: Physically blocked (D+/D- pins disconnected)
Compatibility: Any USB-C device — phones, tablets, earbuds, power banks
Size: Compact, keychain-friendly
Limitations — read before buying
We believe in transparency. This blocker won't work for every situation:
• No fast charging — Technologies like Qualcomm Quick Charge, Samsung Adaptive Fast Charge, and USB Power Delivery negotiation require data transfer. With the blocker, your device charges at standard 5V/2.4A speeds. Still perfectly usable — just not fast.
• USB-C only — Both ends are USB-C. If your device uses Lightning (most iPhones), you'll need a Lightning-to-USB-C adapter.
• Not for laptops — Laptops require power negotiation via USB-PD, which needs data transfer. The blocker will not charge laptops or high-power devices.
Pair with other privacy tools
Faraday Bag — Block all signals when you need to disappear
CryptPhone (GrapheneOS) — A phone that respects your privacy by default
CryptHub Router — Encrypt your entire network connection
Frequently asked questions
Will my phone still charge with this?
Yes. The blocker only disconnects data pins — power flows through normally. Your device will charge at standard USB speeds (5V/2.4A). It won't be as fast as proprietary fast charging, but it works reliably with any USB-C device.
Does this work with iPhones?
iPhones use Lightning ports, not USB-C (except iPhone 15 and newer). For older iPhones, you'll need a Lightning-to-USB-C adapter between the blocker and your phone. For iPhone 15+, it works directly.
Can I use this with a laptop?
No. Laptops require USB Power Delivery (USB-PD) negotiation to charge, which needs the data pins. The blocker will prevent your laptop from charging. This is designed for phones, tablets, earbuds, and other small devices.
Is juice jacking a real threat?
Yes. The FBI, FCC, and multiple security agencies have issued warnings. While large-scale attacks are rare, targeted attacks at conferences, hotels, and airports have been documented. A 9 euro blocker eliminates the risk entirely — cheap insurance.
Why not just use a wall adapter?
That's a good option when available. But in airports, hotels, and rental cars, sometimes USB is all you have. The blocker ensures those situations are safe. It's also useful when someone offers you a cable you don't own — you never know what's inside it.
Does this block both directions?
Yes. It blocks data transfer from your device to the charger AND from the charger to your device. Neither malware injection nor data extraction is possible.
