Faraday Bag for Laptops & Tablets - 2 Pack 20 x 15 inches and 15 x 10 inches Faraday Cage, Faraday Key Fob Protector, Fireproof & Waterproof Key Fob Signal Blocker, RFID Pouch for Key Fob(Black)

We live in difficult times. My Kia Sportage was stolen in January, then in the shop for more than three months, waiting for parts! From reading on line, I’ve discovered that thieves can electronically capture your key code, if it is a remote control starter, even from your house. Lightening, which is very frequent with storms where I live, has already struck near my house once, tripping my solar energy panel breakers—it showed up when the City was preparing my bill, and the City staff noticed there was no reading from my solar panels, and called me. So I lost a month’s solar energy credit—worth about $70–$80. I was fortunate nothing else apparently was damaged, although my car panic alarm was set off, too!These devices, which are designed for computers, cell phones, and credit cards, and called “Faraday boxes” can shield objects inside from electromagnetic forces.Given my extremely bad luck history, I decided these would be a good investment—at least I feel I’m taking back some semblance of control!I use the car key protector regularly, taking the key fob out only to lock or unlock my car. I keep each of my three credit cards in its own Faraday folder. Seems common in Austin, Texas, to have somebody hack into people’s credit or debit cards, at certain locations!Another issue: Lightning striking a house emits a powerful electromagnetic pulse, which could fry everything electric or electronic in the house! (This happened once to my parents, in Prairie Village, KS.) Solar flares are occasionally strong enough to knock out electrical power—but usually much farther north! So I bought these products as at least SOME protection from lightning, and sophisticated thieves. I’m happy with my choices. The price was inexpensive for the peace of mind.I don’t know—somewhat doubt—these devices would be sufficient to withstand an atomic bomb overhead explosion. I hope to God that never happens, but the risk is non-zero. Thus, some of the more expensive options—considered “military grade.” In the (unlikely) event that a nuclear explosion was detonated over some part of the United States, an electromagnetic pulse generated, would be so powerful as to cripple a large part of the country; everything dependent on electricity or electronics which hasn’t been “hardened” against attack would stop working. The military, and certain other key city and state facilities must be hardened against this possibility. It’s too expensive, though, for most of us to afford to take countermeasures.For my budget, for now, I’m happy with the products I bought. I use the key fob protector and credit card sleeves all the time. I put the computers and iPhone in their bags during thunderstorms; much cheaper than having to replace them, I figure.Should every one have these Faraday boxes? Your decision; after my experiences with my car in the last year, plus having my house at least VERY CLOSE to a lightning strike recently, I’m feeling risk adverse!By the way, your microwave can act as a Faraday device; it’s a cheap way to store your iPad and iPhone; maybe an expensive camera, out of harm’s way during a storm! I travel occasionally, so the bags will be useful then, when my microwave isn’t available! You can make your own Faraday boxes, out of aluminum foil, if you would rather save money. But, then you start looking a bit daft to strangers, and have to do a certain amount of testing, to be sure your design is effective! I like the design of these products, which fold over, in most cases, completely encasing what’s inside. They are well-designed, and should hold up for the foreseeable future. Aside from nuclear attack, I believe they will provide the protection needed from lightning and sophisticated thieves. Quite extensive information about electromagnetic forces is readily available online.

Does it block RF signals yes. Does it block "all RF signals"? I don't know, but it does work. Pt your phone, tablet, or laptop in and close it properly and it basically black holes your device. It's well made of a thick rubberized outer material that seems to be very protective and the interior faraday cloth is soft and non scratchy. For best results though shut off your device that way it doesn't waist power looking for a signals to connect to. I'm probably going to get a couple more for our other devices and as gifts for some fellow "Contingency Planners".

These will block signals while they are on your device. However be aware that they will not block sound and if someone is already hacking your devices they will still be able to retrieve information once you take The device out of the signal blocker. So it really only works to keep stuff out for devices that have not already been compromised.

If you are looking for a protection bag these work well. Velcro. Closures strips. They are great quality for protecting what you need to protect.

Works Great!! Perfect for blocking my teenagers phone! The faraday bags arrived just in time when my daughter was in trouble, and I had her drop her phone in the bag. It blocks all signal!!The other bag I’m using to keep an extra key fob in my SUV, it blocks the signal fine. Without a faraday bag, the car would not lock with a key fob in it. Now it does. I’m always paranoid of losing the keyfob in our favorite amusement park we go to all summer (Cedar Point). So now I can keep an extra in the car.Recommended!!