Relay Attack Prevention Key Case for Smart Radio Wave Car Relay Attack Radio Wave Blocking Key Smart Key Birthday Compatible with All Car Models

[Relay Attack] In a relay attack, a special receiver is used to pick up the weak radio waves constantly emitted from the smart key. This receiver then acts as a relay point to transmit radio waves to the car, which mistakenly believes that the instruction came from the smart key, unlocks the doors, and starts the engine. [Relay Attack Prevention] Simply place your smart key in this radio wave blocking case to completely block and stop the key's radio waves. This effectively prevents car theft via smart key radio wave relay. It's the best solution for preventing relay attacks. [Signal Blocking Key Case] The backing is double-layered with signal-blocking fabric to enhance signal blocking effect and product durability. It immediately interrupts radio waves from your smart key. [Easy Car Theft Prevention] This pouch is designed in a case style and holds one smart key. It's easy to insert and remove the smart key, making it convenient to carry. It's compatible with various models from Toyota, Honda, Nissan, Mazda, Suzuki, Subaru, and others. Please read before purchasing. *Note: This product is not compatible with the new 40-series Alphard key. 【Superior Design】Made of abrasion-resistant, high-quality PU, with a copper zipper, and featuring an elegant appearance and color design, it's perfect as a gift or for your own car security. 【Internal Dimensions: 8 x 4.2 x 2 cm】 [Peace of Mind Guarantee] In the unlikely event that the smart key signal blocker we sell is damaged, defective, or otherwise faulty, we will replace or resend the product, or provide a refund to ensure your satisfaction. This key case prevents relay attacks and blocks radio waves from smart keys, making it a car theft prevention device compatible with all car models. In a relay attack, a special receiver is used to pick up the weak radio waves constantly emitted from the smart key, and this receiver acts as a relay point to transmit radio waves to the car. The car then mistakes this for a command from the smart key, unlocks the doors, and starts the engine.