Tech-Protect KLR300 RFID Blocking Car Key Case - BlackThe Tech protect KLR300 Faraday Cage is an advanced case designed to protect keyless car keys from theft using the "signal extension" method. The case effectively blocks radio signals, preventing unauthorized access to the vehicle. The key can be easily inserted and removed from the case, making it quick and hassle free to use. Inside, there's a convenient chain and ring to which you can attach the key, providing added security and convenience. Made