The card holder can effectively avoid the danger of magnetic disappearance or information leakage of bank cards, ID cards, information cards, social security cards, etc.; and damage caused by electronic electromagnetic waves; its function eliminates electromagnetic interference () interference and electromagnetic radiation on the IC card. damage. At the same time, it is airtight, , anti-static and anti-radio frequency. Description: Product Name: Anti-degaussing card holder Material: aluminum Color: silver gray Size: 6.3x9.1cm Quantity: 10 Product Category Card Set The main function: 1, to prevent strong static interference 2, to prevent damage to strong electromagnetic fields 3. Prevent malicious theft and steal your personal information 4, extend the effective use of smart cards Package Contents: 10x anti-degaussing card holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.