The Lanpard Faraday Pouch 2 Pack is designed to protect your car keys and transponders from RFID signals. The Faraday cage inside the pouch blocks any incoming or outgoing signals, ensuring your vehicle's security remains intact. With the medium size model from Lanpard, you can safely store your keys and transponders without worrying about RFID interference. Perfect for drivers looking to enhance their car's security system, this Faraday pouch set is a practical and reliable solution.