1. Put Huajing nano heart card into a small cloth bag or fix it directly on the inside of underwear with a special brooch.
2. The mesh surface of the cardiotonic card (YH-K3) faces the heart, and the smooth surface (the side printed with Huajing font) faces outward.
3. Put the heart protection card on the heart for use.
The above is how to use the Enron Care Card. You can learn more details in the product brochure or Enron official website.