Blocks Signals VERY WELL
I decided to get Me a Faraday Bag, because I have a Push to Start SUV. As soon as I got the Bag I tested it. I placed Keys in the bag and tried unlocking my Door (both with the bag open and with the bag closed) and was not able to unlock my door Until I removed my Keys from the Bag. I also tested to see if I could start my SUV just in case someone got into my SUV (again with the bag closed and with the bag open) and was not able to start my SUV Until I removed my Keys from the Bag. I also tested to see if it would block phone signals by placing my phone in the bag (I did this test also with the bag closed and the bag open) and using someone else's phone to call my phone and my phone did not ring. I'm thinking about getting 2 More just for my Laptop because I don't think my 14" Laptop will fit in one Faraday Bag without part of the Laptop sticking out.