Specifications: Colour: Black Size: 149.51cm Expand 209.51cm Material: outer PU leather + carbon fiber inner shielding fabric Features: 1.Carbon fiber appearance design, more durable. Prevents NFC, Bluetooth, GPS/SatNav networks, 2, 3 and 4G mobile phones and WiFi connections to prevent all frequency signals from being sent by your car fob Or receive. 2.The metal lining provides a complete signal blocker for your car key. This prevents thieves from obtaining and forwarding signals from your key, thereby preventing illegal entry and keyless ignition theft. 3.At home or when going out, this multifunctional protective bag can also be used for bank cards, your entry card, remote control keys, and other small smart items that store electronic data. The bag will block all signals from entering and leaving your device, preventing remote access and control thieves. Faraday bags also block electromagnetic signals to prevent accidental data loss and damage. 4.Double pocket design: a bag-like lid includes two inner sleeves; one has a metal lining for signal shielding, and the other container is for general storage. A safe, hook and loop fastener and high-quality, waterproof, synthetic leather body keep your keys from harm. Package inclulding: 2*Car key case