"SECURE YOUR CARThe faraday pouch effectively block all signal in the bag which prevent criminals from using key fob skimming tools to access your vehicle. COMPACT SIZEExcept the ensure the faraday bag works well,the case count different shape of key fob and specially design the size of new bag which can really convenient use it every day. Practicable, User-friendly and Reliable. HOW DO I KNOW IT WORKS?You can test it by yourself Simple place the car key into the bag, and you will find no reponse from your cars. ELEGENT BAGCarbon fibre surface and compact size. With elegant and stylish apperance, this is a luxurious car key bag you can't miss 100% SATISFACTION GUARANTEEDFor any reason you are not satisfied with your anti-theft keyless faraday bag , please contact us."