Card Holder for Credit Cards, ID, Driving Licence, Business Cards, etc. - Strong Sticker to Attach - Wallet Replacement - Money Clip or Holder for Cable/Earphones - with Rebel Tone Cleaning Cloth To use this product: [1] Peel off the backing of the strong 3M sticker. [2] Attach the card holder to your phone. [3] Insert a maximum of 4 cards into the card holder. Perfect for all standard sized card types like credit cards, business cards, ID, driving licence, membership card, air miles, etc. Can also be used to store money, charging cable, earphones, flash drive, cigarette lighter, etc. The neoprene material offers a tight fitting for your cards, securing the cards (or other contents) inside the pouch. The card reader will stick firmly to your phone. If you ever want to remove it, you can simply peel it off. There will be no traces left on your phone.