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Instructions A. Product description: The smart ring is a fashionable and wearable electronic product which is able to connect with a smartphone through Near Field Communication (NFC) to complete function performing and data sharing. Designed with high-level water resistance, it can be used without any power supply. Embedded with NFC chip, it can only be connected to a smartphone with NFC function. B. Detailed operations: Place the smart ring within the NFC area of a smartphone to perform: screen unlocking, app lock unlocking, app quickly launching, name card and URL information sending and reading, etc.