Wisdompro Radio Blocking Pouch, Smart Key Case, RFID Blocking, Relay Attack Prevention, Car Security,

Material: Surface: High quality PU leather, Radio blocking pocket on the back: Silver RFID blocking shield foil (double layer reinforcement); Size: 5.3 x 3.9 inches (13.5 x 10 cm); Quantity: 2 piece set 【Shut-off Frequency Range】10MHz - 3GHz Fastener Type: Velcro It completely block electromagnetic waves such as car smart key signals, Wi-Fi, GPS, Bluetooth, RFID, smartphone communication signals, and electronic money signals Convenient Design: The size is easy to use and has a small metal ring that is convenient to hang on your bag or on your waist, so you don't have to worry about losing it (Double Layer Blocking/Safe and Secure) There are 2 storage pockets, and an internal radio wave blocking pocket contains RFID blocking material (silver sheet that shatters). The outer layer of pocket does not block radio waves and be used as a regular wallet to store business cards, coins, tickets, etc. Furthermore, the block material sheet has a double layer structure, making it more effective and more durable than other single-layer blocking pouches Relay Attack Theft Prevention: An affordable and easy tool to protect your precious car against theft, called "Relay Attack" is a smart key radio blocking pouch. Simply insert the radio wave blocking pocket on the inner layer to completely block electromagnetic waves. By blocking unauthorized radio waves, it prevents skimming and damage to car theft

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