When Smart Tags and Smart Cards are used as smart labels, they eliminate the use of paper labels. It is an eco-friendly product. The displayed content on Smart Tag and Smart Card can be text, graphics, barcode, or QR code.  Information on the e-paper of Smart Tags ST1020 and ST1027 can be changed or rewritten 10,000 and 30,000 times respectively.  In the case of Smart Card SC1029L, it is more than 1,000,000 times because it requires no battery.