【Protect Your Car】The car key Faraday pouch can prevent thieves from amplifying your key fob signal and opening the car, effectively preventing remote access to your keyless entry key fob and better protecting your car. 【High Quality Material】This car key signal blocker pouch is made of high quality material and thickened shielding material, the fully enclosed design can provide better signal shielding, each has been tested reliably, please use it with confidence. 【Portable Design】The interior key ring can be easily matched with your car keys, and the external hook can be carried, which is more convenient. Note: The data are all manually measured, please allow 1-3cm error due to differences in light and display, there may be some color differences, please understand. refer to the actual item received.