RFID tags are the centerpiece of any RFID system. RFID tags can be offered in different sizes, frequencies and can be affixed to a variety of surfaces, including metal. They store the item data essential to any RFID tagging system. Haoyinjia offers UHF (Ultra High Frequency), HF (High Frequency), and LF (Low Frequency) RFID tags that are used for access control, data center management, file tracking, livestock tracking, and many other applications.