Radiation (electromagnetic wave) is everywhere.
There are many electronic appliances that produce electromagnetic waves around us such as cell phones, Wi-Fi radios, TVs, radios, microwave ovens, etc.
anti-static cloth, blackout curtains, radiation handbag,
It is also useful for the production of other private products.
It can be used as a wallet or handbag insert,
Your credit card will be protected from data theft.