DESCRIPTION A must-have accessory to protect your car against keyless car theft. This Faraday bag ensures the security of your key fob or keyless entry system by effectively blocking outside interference. With signal blocking Faraday technology, it creates a barrier that blocks wireless signals from entering or exiting, providing comprehensive protection for your vehicle against relay attacks, car theft, and unauthorized access. Instantly Block: Cellular, WiFi, Bluetooth, GPS, RFID, NFC, Satellite, Navigation, EMP, Solar Flare, Key Fob and EMF Radiation KEY FEATURES Silent Pocket® Faraday cage with snap closure Extra small features a fold and snap closure to minimize the size of the bag External key chain loop Great for: Everyday use, spare keys, traveling SPECIFICATIONS Materials & Trims Exterior: 500D Weatherproof Polyester Lining: Multishield® Faraday Shielding Material Dimensions EXTRA SMALL: External: 5.1 x 4.13 in (13 x 10.5 cm) Internal Use: 4.33 x 3.54 in (11 x 9 cm) Weight: 0.05 lbs (0.02 kgs) FARADAY TECHNOLOGY The main compartment of this bag is a Silent Pocket® Faraday Cage and is rated to the following specifications: Silent Pocket® Faraday Technology Instantly Blocks: Silent Pocket® with Multishield® (Faraday Shielding Material) is MIL-STD-188-125-2 compliant, and exceeds IEEE 299-2006 (1 - 40GHz) standards. (100,000:1 reduction, see testing page here ) Blocks Cellular, WiFi, and Bluetooth signals. Blocks GPS tracking, Satellite, and Navigation signals Blocks NFC and RFID such as chips in passports and credit cards Protects your head and body from EMF radiation Blocks electronic car key fobs from relay attacks and electronic theft : 315MHz (U.S. and Japan) and 433.92MHz (Europe) Shields against EMP, HEMP, CME, Solar Flare, and static shock