【Car Key Signal Blocker】Put your cell phone, car key, passport, credit cards, transmitters or small electronic devices inside the Faraday bag to prevent hacking, tracking, attacks Signal amplification and data theft, protect your privacy. Fireproof and water-resistant: high-quality synthetic leather, wear-resistant, neat stitching. Not only is our key fob protector fire resistant but it is also highly water resistant just in case it gets wet for any reason it will keep your key or cell phone safe. Signal blocking: high viscosity magnet, hermetically sealed. Anti-radiation shielding signal, anti-location tracking, ETC OBU shielding, anti-signal detection, anti-disturbance and leakage. Large size and easy to carry: dimensions of 37 x 26 cm, can hold 14" laptops and tablets. You can hold large phones, multiple key fobs and large wallets. The large size fits many items at once, and it is light and convenient, you can always take it in your hand. Note: The data are all manually measured,