EDEC XLarge Non-Window Size - Signal Blocking, Anti-tracking, Anti-spying, Radiation protection for Cell Phones, Key Fobs and Credit Cards Forensic faraday bag designed for law enforcement digital forensics and military cell phone exploitation XLarge size bag: Put multiple cell phones, GPS, tablets or laptops inside to block cell signals, satellite, Wifi, and bluetooth frequencies Proprietary ISOTech faraday fabric provides best in the industry signal shielding, you won't find better! High quality materials and construction protects faraday fabric and lengthens life of bag 72+ dB attenuation from 100 kHz to 8 GHz