The acousto-optic tag Speedingiot developed basically adds acousto-optic reminder function to the traditional RFID/NFC tag, so as to quickly locate and find the specified item (LED or Beeper sound reminder) in the management of goods such as warehouses and freight stations. It is widely used in warehouses, hospitals and libraries, and is mainly used in the main application fields of inventory item positioning, shelf positioning, clothing and hat search positioning, book search positioning and file search positioning.