＜Detailed Description＞ This is a new, unused item, but it has been opened for photography. ★ Relay Attack Prevention: Prevents theft using relay attacks, where the radio waves from a smart key are intercepted and relayed to the car to start the engine. This case blocks radio waves, preventing theft by relay attack. ★ Box-Type Key Case: This box-type key case has a chain inside. You can attach your smart key to the chain, so you don't have to worry about the smart key falling out when you open the zipper. ★ Convenient Carabiner: Comes with a carabiner, so you can attach it to a belt loop or bag. You don't have to worry about losing it, and you can simply open the zipper and take out your smart key when you need it. ★ Just the Right Size: The internal dimensions of the box are 8.5cm x 4.3cm. It's the perfect size to fit your smart key. The product size is 10.5cm x 6.5cm x 3cm. It's compact and won't get in the way whether you put it in your bag or attach it with the carabiner. ★ Carbon Leather Material: Durable and water-resistant, so you can use it without worry on rainy days. Available in black. It's a cool and stylish key case, perfect for a gift. Ideal for friends or family who have bought a new car, or for housewarming gifts. It's a design that anyone will love. ※ Internal box size: 8.5cm x 4.3cm ※ Product size: 10.5cm x 6.5cm x 3cm ※ Material: Carbon leather KK09111938