Phone card holder can keep 3 ID card?? credit cards?? driver's license?? business cards??student ID membership card?? insurance card?? discount card?? frequent flyer card?? etc. Can also be used to store money?? charging cable?? earphones?? flash drive??etc.</br>Slim design phone card sticker with 0.20 inch thickness makes it very light weight.Silicone card holder provide additional grip for the phone on smooth surface</br>The 3M adhesive removable tape allows the YUYIKES Pouch to stick on strongly and easily be removed without any residue. Once it barely touches the phone?? it's already sticking.and it's using High silicone from top manufacturer.no peeling edges??durable.</br>Preserves your smartphone's beauty with a slim and soft feeling. Stick it on your smartphone or on it's protective case!</br>Supports all smartphones which has a flatback?? with enough