- RFID Key Fob Protection: Safeguard your car with our advanced Faraday bags designed to block EMF, RFID, and hacking signals. No more worries about thieves amplifying your fob signal to access your vehicle. - Comprehensive Signal Blocking: Made from premium carbon fiber and double-layer military-grade RF shielding material, our waterproof Faraday bags block all signal types, including WiFi (2.4 and 5 GHz), Bluetooth, GPS, and car key signals. Just place your key inside and rest assured that your car is secure. - Functional Design: The upgraded zinc alloy hook and key chain make the Faraday bag durable and portable. Easily attach it to your pants or backpack for convenient access. Featuring high-quality Velcro for a secure closure, this bag ensures reliability with extensive testing for long-term performance. - Versatile Size and Pack: Each Faraday bag measures 3.5 x 5.5 inches (9 x 14 cm), accommodating various keychains and small devices. The set includes two medium bags, ideal for protecting your spare key fob or multiple vehicles within your household. - Practical Use Cases: Perfect for daily use when out and about, during travel, or while parked in public spaces. Ensure your car keys are protected against unauthorized access at all times with these essential accessories.