The Samfolk Faraday Box & Pouch 2 Pack is a set of signal-blocking boxes and a pouch designed to protect car keys from RFID theft. The extra-large box size of 16.3 x13.3×7.1 cm fits most car key fobs and blocks signals from unauthorized access. The RFID anti-theft Faraday cage technology ensures car security and prevents car theft. The set comes with a faraday pouch for added portability and convenience. Overall, the Samfolk Faraday Box & Pouch 2 Pack is an essential car key protector for preventing car theft and ensuring car security. Keep your car safe and secure with this practical and reliable car key protection set.