4smarts USB-C and USB-A Data Blocker – Safety for Your USB Ports
The 4smarts USB-C and USB-A Data Blocker is a set of two adapters that block data transfer over USB while allowing charging up to 240 W. The adapters protect against unauthorized data access at public charging stations or computers.
Completely blocks data transfer – prevents data theft ("juice jacking") at public USB ports
Supports fast charging up to 240 W – suitable for notebooks, tablets, and smartphones
Set includes USB-C to USB-A and USB-C to USB-C adapters – maximum flexibility
Compact and lightweight design (20 g) – ideal for travel
USB 2.0 standard (480 Mbps data transfer, blocked) – compatible with common devices
What sets the Data Blocker apart
Unlike simple USB caps, the data blocker actively prevents any data communication between your device and the power source. The adapters are passive and require no software or drivers. The two variants cover the most common connection combinations: USB-C to USB-A (for older chargers) and USB-C to USB-C (for modern devices).
Ideal for...
This set is aimed at frequent travelers, business professionals, and anyone who regularly uses public charging stations at airports, hotels, cafes, or conference rooms. It is also suitable for IT security officers who want to protect their employees from data theft.
How to use the Data Blocker
Insert the appropriate adapter between your charging cable and the device or power source. The adapter connects flush – no additional cable needed. After use, simply unplug and store in its case or pocket.
4smarts is a brand of USB accessories and security products such as adapters, data blockers, and chargers. Its products target consumers who value data protection and compatibility.
A data blocker is an adapter that interrupts the data contacts in a USB cable, allowing only power to pass through. This prevents data from being read from your device when charging at public USB ports.
The set includes two adapters: one USB-C to USB-A and one USB-C to USB-C. Both block data transfer and support charging up to 240 W.
The adapters are compatible with all devices equipped with USB-C and USB-A ports, including smartphones, tablets, notebooks, and power banks. USB 2.0 (480 Mbps) is supported.
Yes, the adapters support fast charging up to 240 W, allowing even notebooks and other high-power devices to be charged safely.
4smarts provides a 24-month manufacturer's warranty on the data blocker set.
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