Small leather key cases that 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. Even if you stand next to the car with the key in the pouch, the car cannot not be opened, so the transfer of information is properly blocked These bags work as keyless key fob signal blockers, capable of blocking RFID and NFC signals from the key fob, preventing hackers / thieves to remotely control and gain access to your car or car. These CE certified bags are safe for everyday use. Equipped with nano-coating, the bags appear with unique carbon fiber texture, which is soft, abrasion-resistant, anti-demagnetization and anti-radiation, which provide long-term protection. Bags are compact enough to put in your purse or backpack for easy carrying. The chain attached with a ring head provides convenience for hanging and improves portability. Wide range of applications The car key case has two layers , one is a gold shield which can shield the signal, and the other is a black ordinary bag which cannot shield the signal. Put the object to be protected into the gold layer and close the cover completely, which can shield the signal. Product Specifications Weight: 100g Size: 12.5*8cm Color: Black