1. Material: PU leather + magnet + button + metal card box. 2. Large capacity: can place 1-10 cards: can store credit cards, ID cards, business cards, cash. 3. Function: Side button can eject card, easy to disassemble. 4. Protection: The card is placed in a metal card box, which can prevent theft. 5. Buckle function: When multiple cards or cash are inserted on the side, they can all be closed together.