JSAUX USB Data Blocker & USB C Data Blocker (4-Pack), Transparent Type A & Type C Data Blocker Only for Charge, Protect Against Juice Jacking, Prevent Hacking for Safe Charging

This "data blocker" device plugs between some USB charger and your equipment (for example, your smart phone). I find them especially handy as a "security device" to protect my phone from being hacked when using a "charging station" supplied by some business. Such "hacking" is possible because most phones use the same USB port for charging that is also used for communication between the phone and other devices and computers. So if the "charging station" happens to have been modified by some criminal (and it is not always a criminal working for the company that is supplying the "charger"), the criminal now owns my device instead of me (and such a malicious "hack" can be completed in under a second's time). However, this "data blocker" can prevent this "hack" from succeeding (by blocking all USB data communications to your device). As a result, I keep this "data blocker" in my phone's case, so I always have it with me when traveling (so I can safely use chargers that some business have provided for my convenience). One minor disadvantage of this "data blocker" is that it prevents "fast charging". This is because the "fast charging" protocol requires communications between the charger and the device (to tell the charger how much additional power the device said it was safe to send them). And since this "how much extra power can I safely send you?" communication from the charger is blocked by this device, the charger will never switch from using its basic "slow charge" power levels. So when I really need "fast charging" I instead use my own charger (that I'm pretty confident hasn't been criminally modified) and just plug it into an available power outlet. But I do like keeping these "data blocker" devices around for situations where I don't fully control the charger I'm using. And I've also found these "data blockers" handy when I simply want to charge a computer (be it a phone or a laptop) without instantly triggering its data transfer protocols. For example, I have powered USB hubs connected to multiple computers around my home. And I sometimes want to use a free port on one of those hubs as a "charger" for one of our family's phones. But if I plug the phone directly into the hub, the phone and computer both think I want them to start a data transfer (not disastrous, because I can just tell both devices no data transfer, but this behavior is annoying). However, if I plug one of these "data blockers" between the USB hub and my phone I just get a basic "slow charge" and neither device thinks I want to start a data transfer. NOTE: The version of this "data blocker" devices I purchased was the 4-pack that contains 2 basic USB-A devices, and 2 devices designed for USB-C plugs/jacks. I use both of these devices. The USB-C devices are handy with my cell phone (and also slightly smaller to carry around than the USB-A devices), as I just plug them directly into my cell phone's USB-C jack and then plug the charging cable into the other end of this "data blocker". And the USB-A devices are handy when the "charger" comes with either a basic USB-A plug or USB-A jack (as I then just plug the "data blocker" directly into the "charger", and plug my cable between this "data blocker" and the device I want to charge).

As far as I can test using my Apple laptop and my cellphone, the devices work -- the laptop doesn't recognize the iphone but the iphone is getting charged. The laptop also doesn't recognize various flash drives when I use the devices. The items are made of solid metal with some heft to them. The connection points are reassuringly snug.

Works as described. Mostly used for applications that didn't have smart/fast charging, so the speed I got I was happy with. Worked well for a device I wanted to power on in the car without it trying to connect to the Android Auto or whatever.

I bought the re data protectors and they did not work. These fit our charger cords and seem to work! At the least they allow my phone to charge. do they protect my data?? I'm going to believe they do.

The deal comes with 4 plugs, 2 for USB-C to USB-C and two regular USB to USB plugs. They got them to me quickly and they seem to be made well enough. The price was right so, I’m happy I tried them.

One of these broke not long after I got it. Unable to use the broken one. I recommend finding higher quality ones than these. Update*** upon hearing about the piece that broke, JSAUX reached out to me and issued a full refund. I appreciate their willingness to make this right bc the return window had already expired. I feel so much better knowing they stand behind their products and work to make things right.

Works exactly as it should, looks nice, great for peace of mind during travel or for niche applications like connecting a dashcam to a car where the car wants to use anything you plug in as a USB storage device. Nice price, nice combo of USBA and C, great product.

Worked fine.