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)

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.

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.

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

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.

It works.

This was used to test some quality use cases for a smartphone : Go from a good coverage area to marginal coverage and finally loss of service, then back to coverage. Normally engineers rent a vehicle and drive through specific areas to run this, however we wanted to see if this product could come close to simulating that.It didn't.Here's how it was tested:1. We connected the phone via USB cable to a PC and used an application to mirror the display (so we can see what the phone shows on the PC screen).2. Verified normal coverage in RSSI. (Take the absolute value and the lower, the better)3. Place the phone in the bag and fold it per instructions.BEFORE: We saw regular RF signal to be between -99dBM to -101dBM before placing it in the bag.AFTER: We saw a very marginal loss of reception down to -107dBM meaning the device was still attached to the cellular network. (We would see loss of service around -115 or more)CONCLUSION: This may block verrrrrrrrrrrrry little RF, but it you get what you pay for. In this case absolutely nothing.QUESTION: But what about the cable protruding from the bag? This should not be enough for continuous RF signal to be received. RF is measured as radio waves and antennas use complex beam forming methods to send and receive it. Based on the positioning of the antenna in this device and placement in the bag, along with how many times it was folded, this should not pose significant deviation for this test.FINALLY: This is garbage.

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.

Picked this up to attend a popular hacking con.I like my phone and Ipad and wanted to keep them secure while at a con.Tested by calling my phone from another phone, and dropped it in the bag during the call. The call ended.Also turned the ringer all the way up, put it in the bag. Called from another phone and it went to voicemail.So I was comfortable it worked as needed.Left them on, and in Airplane mode, then in the bag they went.