The car key bag is made of carbon fiber , and general pocket bag is suitable for most car keys. It protect and other electronic products: At home or outdoors, this multi-functional protection bag can also be used for bank cards, entry cards, key chains and other smart items that store electronic data. Features - Color: Black. - Material: Carbon fiber. - Size: 14.5 x 9 x 1cm. - Keychain signal for car theft prevention: Metal lining provides a complete signal barrier for your car key. - This prevents thieves from picking up and transmitting signals from keys to prevent burglary and keyless ignition from being stolen. - The protection bag can also electromagnetic signals to prevent accidental data loss and damage. - This car sealed bag has built-in signal isolation function to keep it safe: Pevent RFID, , , GPS/SatNav network, 2,3 and 4G mobile phones and WiFi connections, prevent all frequency signals sent or received to your car keys. - Can not put mobile phones, can only put car keys, bank cards, entry cards, etc. Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 2 Key Bags