It’s for modern keys to stop thieves using a device to steal your car. So if you keep your key in the pouch it blocks the signal?
I don’t have a modern car key thingy so it’s no use to me. Will also work for bank cards, if you travelling and people use card reader to tap and steal money from wallet. Wonderful item for safety conscious people!
Google it if you need more info!
Car key pouch to prevent theft (Addiscombe CR0)
This offer has been gifted to someone and is no longer available.