3 Pack Mega Kit NX3 Triple-Layer Cyber Fabric Faraday Bags - Fast, Easy Access for Device Shielding - Protect Data and Devices from Hacking, Tracking, EMP

These bags are great, I tested them right after getting them with my cell phone, and there was no signal coming out or going in, my cell phone went straight to voicemail. They work!!

Works great!! Item just as listed, thanks

This is essentially a glorified aluminum foil zip lock bag (I don't know if this particular bag uses aluminum or some other material). But I wouldn't trust myself to be able to wrap my electronics properly with aluminum (note, if you leave a gap somewhere, your electronics might get fried when an EMP comes). Also if I need to access it, it'll be a pain.I saw a YouTube video by the EMP Doctor where he put a radio receiver inside the bag to measure the radio signals it picks up and showed these bags did the best, which is why I pulled the trigger and bought these bags. I also tested each bag when I got home using the following steps:1. Turn my cellphone on loud2. Ask someone to call me (alternatively you can use the "Locate my phone" feature available on most phones these days)3. My phone rings on loud and receives the call.4. Put the phone now in the bag and seal it5. Have someone call again6. No ring from my phone.After I took my phone out of the bag, it actually showed for a few seconds that I had 0 bars and no WiFi signal which is pretty cool. So this thing definitely works. I'm putting my emergency radio in one of these before placing it in the bug out bag. I also have an empty one in my bug out bag for storing my phone.The smallest size is good for phones. The medium is good for tablets or something like an emergency radio. The large one is for laptops. I personally would've preferred to have more of the small or medium bags.Overall, these are great, but I do wish they were cheaper. Although if SHTF, I'd pay anything to make sure my emergency radio and cellphone are still working.

I tested it with my cell phone playing music connected to a speaker via bluetooth. When I out the phone in the bag and sealed it the bluetooth disconnected. when I took it out it reconnected. I. put it back in and had someone call me and it didnt go through, they said that on their end the call failed. I tried the find my phone app on my laptop to locate the phone and play a sound and it could not locate it nor play the sound. Text messages sent to my phone where not able to be received till after I removed it from the bag. Im happy.

I pull my cellphone on speaker and called a friend. The call got static just by going into the bag. Just before/or during the first roll the call was disconnected. I like the variety of sizes. Ham radio in the big one. Battery banks and accessories in the medium. Cellphone and such in the small one. I plan to buy more. Im verry happy with them.

It works, and other than that, I can't think of any better compliment.

Protect your valuable laptop, ever gadget you've got: cell phones, tablets, laptops, external hard drives, flash drives, electronic car key. These really work. I bought two sets, and I take the time to put everything away when not using. Still need to find a frequency leak-proof cover for IMAC.....

I had the opportunity to test these bags, and they work well if you're aiming to block your cell phone signals. However, I wouldn't recommend purchasing anything larger than the smallest bag, rendering the 3-pack somewhat redundant. During the test, we placed an older iPhone 8 inside the bag, called it, and monitored its connectivity. While it's true that the bags can block some signals, the material isn't effective at shielding against all forms of communication or EMP attacks, which could occur in the microwave range (GHz, not MHz). Despite using the bag, the device was still able to communicate wirelessly on the 2.4GHz and 5GHz bands. This indicates that the bag is not very effective at shielding against the effects of an EMP. It's worth noting that most mobile devices already have relatively small antennas. Thus, simply powering them off and placing them in a safe or another secure location may be just as effective or even better in some cases.