Blocking the Signal Adopts RFID blocking material to help prevent unauthorized signal access to your car key, enhancing property safety. Protect your vehicle from potential keyless entry theft. RFID Protection The front pocket provides radiation shielding, ideal for storing ID cards, credit cards, and similar items. The back pocket offers signal blocking protection, designed for car key fobs. Effectively blocks signals including cellular, Wi-Fi, Bluetooth, 5G, NFC, RFID, and other wireless transmissions for devices placed inside. Sturdy and Durable Constructed with high-quality carbon fiber textured material and dual-layer shielding technology. Combines reliable signal blocking performance with a sleek, design. Easy to Carry Dimensions: 3.5" x 5.7". Secure flap closure with elastic ensures compatibility with various keychain and small device sizes. Integrated keychain loop adds convenience. Attach keys to the chain and use the external loop to hang the pouch on jeans, belts, or backpacks.