Faraday Bag (15 x 10 inches), Faraday Cage, Cell Phone Signal Jammer, Faraday Key Fob Protector, RFID Faraday Pouch Signal Blocker Anti-Theft Pouch, Anti-Hacking Case Blocker (Black)

Fantastic! This bag, when sealed up all the way (with the velcro), effectively blocks wifi and cellular signals, from our testing. Be sure to fold and seal it up, though; if it's not folded and sealed, signal WILL leak, as with any bag of this style.We were able to actually fit *two* 13" mac laptops in this bag at the same time (a 13" M1 pro and a 13" air), and still fold and seal the bag.We were very happy to find such a well-made, minimalist bag at such a great price point.

I have tested this bag under various conditions using my mobile phone and a electromagnetic field meter. My first experiments indicate works well blocking mobile phone radio links, and even blocks well WiFi radio links at very short distance ( ~ 1 m from a router's with multiple antennas) .However, it is important to understand, that the faraday bag only works well when the velcro seal is completely closed, if there is a gap in that seal, even small, the bag will not block all RF.If you are unhappy with the signal attenuation that the bag provides, use two of them, one inserted inside the other, check both are properly sealed, or use a metallic sealable bag inside the main bag to further block RF links.You can also fold the larger bag in half, to increase the line of sight shield between external antennas and that of the mobile phone, RFID chip or tablet, you are trying to isolate.RF shielding is an incremental process. Multiple layers increase effectivity of a Faraday Shield.

Great capacity. Not heavy. Easy to use. Great quality. Another reviewer mentioned the signal will be completely blocked only when all the velcro was completely closed, but I can be right next to the car and as long as the keys are in the bag even when open the car will not open with passive unlock.

What should customers know? When the next coronal mass ejection or nuclear blast is about to happen so they can run and get all their electronics packed in these faraday bags! But seriously, the one covering my iPad seemed to block bluetooth nicely so I could connect my headphones to a different computer without my iPad intercepting the signal. As for disaster proofing, I'm uncertain. I wish I had one for my whole SUV! I like that there are different sizes. It fits my smaller iPad Pro with room to spare. Plenty of room for key fobs and smaller smartphones in appropriately sized bags.

Does the job… I tested.Sturdy and well made!

Unfortunately, this bag simply doesn't work. It has a number of flaws that render it basically an expensive plastic bag. This faraday bag has a single folding seal, effective Faraday bags have a double folding seal over the opening i.e. fold over and seal the flap to close the bag and then fold that seal over once more and secure it to insure the opening is completely sealed from any RF Energy. The effectiveness of this bag (or anything claiming to offer faraday protection) can easily be tested. Place a cell phone in the bag with the ringer turned up enough you can hear it through the bag, close the bag according to its directions and then call the phone. If it rings the bag is not effectively blocking RF energy from reaching the phone. Even doing the double closure manually on this bag made no difference as the RF blocking faraday “fabric” is not well made and thus not effective in blocking the signals / energy that can destroy your devices.If you really want to protect your electronics, the bag or enclosure needs to prevent RF energy (signals) from getting to the item you are trying to protect (this is a simple example, it is far more technical discussion than this forum permits). In comparison, one can get better protection by putting their device in a sock and wrapping it in aluminum foil than this bag provides. Maybe the best use for this bag might be putting your aluminum wrapped device(s) inside so it looks nicer than carrying around a big chunk of aluminum foil ;)

It works.

It’s a good deal. I also keep my Ford ranger FOB’s key in it at night so my FOB key cannot be duplicated by a thief with an iPad in my driveway.