VEVOR Faraday Bag 4 Pack Signal Blocking Holder for Laptop Tablet Phone Radio XLProduct Features Super Signal Blocking Power Our Faraday bag can block enough various signals such as call data, Bluetooth, WIFI, GPS, RFID and radio signals, etc., which prevents thieves from acquiring and relaying signals from your keys, prevents theft and keyless ignition theft, prevents tracking and protects your privacy, no more worrying about your car being stolen and your meeting information being leaked. Spill & High Temperature Resistant This