Mission Darkness Faraday Bag for Keyfobs // Device Shielding for Smart Always On Keyfobs for Automobile Owners, Law Enforcement, Military, Executive Privacy, Travel Security, Anti-Hacking Assurance The Mission Darkness Keyfob Faraday Bag is the only bag on the market with forensic-grade shielding. Primarily used to prevent the signal relay hack (blocks thieves from copying or boosting your wireless fob code to enter your vehicle). Don't trust other keyfob bags with your expensive vehicles. Also allows you to keep a spare key in your car without your car knowing it! Used for vehicle security, forensics, military, executive travel, personal security, and EMP protection. Shields keyfobs, WiFi cards, thumbdrives, and other small devices from ALL wireless signals. 100% signal block rating. Blocks WiFi (2.4 & 5GHz), Bluetooth, cell signals (4G LTE+), GPS, RFID, and radio signals with 60-80dB average attenuation. EMI shielding & RFI shielding. Three layers of high-shielding fabric on all sides with dual paired seam construction. Fold-over flap ensures signal loss. Unique serial # on every bag. Fold for covert carry. Dimensions: 3.5" x 5.5" x .1" | Secure closable flap with elastic accommodates multiple sizes of keychains and small devices. Water-resistant ballistic nylon outer materials. Keyfobs Building access cards Credit cards Smart watches Transmitters WiFi cards Thumbdrives