EDEC Standard Window Size Faraday Bag- 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 Standard size bag: Put a cell phone or GPS inside to block cell signals, satellite, Wifi, and bluetooth frequencies Shielded window allows preview of device inside to determine battery life, device state, and confirm signal isolation External Dimensions: 8.25" wide x 8" tall; Usage Dimensions: 4.25'' x 7.5'' Fits iPhone 6+. Proprietary ISOTech faraday fabric provides best in the industry signal shielding. Radio frequency shielding spec: 69+ dB attenuation (final bag spec, not just base materials spec)