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.^