Review on 🔒 Secure Signal Isolation Bag: Faraday Bag for Phones, Tablets & Key Fobs - Fireproof Shield Pouch Protects from Hacking, Tracking, NFC, WiFi/Bluetooth (9.8"X11", Black) by Brian Foster

This protected my smart key fob in front of the car. Apparently, thieves have the ability to activate smart key fobs to open a car door and start the engine. A key fob shield prevents this. With my key fob in my Faraday pocket, my machine wouldn't recognize him. I did this while standing by the car door. He took the keys out of his pocket and the car recognized the key fob immediately.