This is Rind the disposable earphones that come packaged up in a credit card sized housing that can be carried in your wallet. They even come with a set of rubber gaskets for a tight seal in your ears. Plus you can put them back on the card for storage. If these ever show up in the market, they would be pretty popular as a disposable and convenient product.
Perfect for traveler where some of them would like to keep our eardrums in working order. To do that you can avoid concerts and the like and it also helps to have a pair of earplugs handy, but it’s not always convenient to carry them around. Unless you could fit them in your wallet somehow, the RNID are designed by Shing Lo.