RFID / NFC sticker is also called radio frequency sticker, intelligent tag. RFID / NFC sticker contains RFID / NFC chip. RFID is used as the basic technology to complete data storage, reading and other operations. Data is stored in RFID / NFC chip. Different from other tags, we use RFID / Mifare Stickers. Generally, we don't need to see where the sticker is, as long as we know where it is located. This is because RFID / NFC stickers communicate with the corresponding RFID / NFC reader and writer equipment by sending and receiving a specific frequency of radio frequency (a kind of electromagnetic wave), and they are penetrating. They don't need to be like barcode tags or lasers As with tags, they need to be exposed so that the corresponding device can scan and read them.