I did test it and works like a charm. You want to make sure that your emergency phone is safe from natural or man made disaster. This is perfect to store emergency communication device (sat phone, emergency satellite communicator, burner phone) with you or in the safe or to bring in travel. It is fire resistant as well, ideal for money or for passport and protect the chip inside. Also it comes in all size….the large one fit a laptop. It protect also fob key from scanning….a must have in may urban circonstances…