DEC OFFGRID Faraday Bags are designed to aid law enforcement, military, and consultants in the collection, preservation, transport, and analysis of wireless evidence. Wireless devices such as cell phones, GPS, netbooks, Bluetooth devices, laptops, etc. are shielded from cellular, WiFi, Bluetooth, and radio signals by a proprietary ISOTech Shielding System when inside the faraday bags. The ISOTech Shielding System is lightweight and durable for use in the field and the lab.