Product Parameters: Color: Black Material: Carbon Fiber Article dimensions 14 x 9 cm Product Features: 1. The smaller leather key cases, which are more suitable to take with you. In addition, there is also a small ring on the outside with which you can attach the pouch to your key ring. 2. Even if you stand directly next to the car with the key in the case, the car cannot be opened, so the information transfer is perfectly blocked. 3.These bags work as keyless fob signal blockers, able to block RFID and NFC signals from fob, which prevents hackers / thieves from remotely controlling and gaining access to your car or automobile. 4. These bags are safe for everyday use. Equipped with nano-coating, the bags appear with a unique carbon fiber texture, soft, abrasion-resistant, anti-demagnetization and anti-radiation, which ensure long-term protection. 5. The bags are compact enough to store in your purse or backpack for easy portability. The attached chain with a ring head provides convenience for hanging and improves portability.