General description Protect yourself from electronic hacking and car theft with the 2PCS Anti-theft Car Key Holder. This portable RFID blocking case ensures that you no longer have to worry about lost cars, providing peace of mind for keyless car owners. Technical specifications Size: 13.5 x 8.5 cm Material: Nano-coated with unique carbon fiber texture Features: Wear-resistant and anti-radiation Compatibility and accessories Compatible with over 99% of all key fobs Includes a detachable key ring and a lanyard with carabiner for easy carrying