Slim, lightweight MagSafe compatible cardholder with a horizontal opening to securely hold up to 3 cards at a time The perfect size for credit cards, ID cards, business cards, metro cards, and more! Card reader compatible for quick scan-and-go Made with long-lasting, durable polycarbonate and soft non-slip inner lining that holds in the 38-piece MagSafe magnets Secure staircase design prevents accidental loss and the safety side-railings prevent scratches on your card and device Use with MagSafe cases only! Securely attaches to your smartphone via innovative MagSafe magnets for effortless installation and removal whenever you need it