SQingYu Stainless Steel NFC Tag Wearable Universal Multifunction Smart Magic Ring
Material: Stainless Steel
Chip: NFC chip
Size:7,8,12,13,14 (please refer to the size picture)
Multifunction: Set up smart lock, card recharge, smart phone unlock, phone important file lock, transfer files.
No charge, programmable read-only lock function, 7-byte serial number clone protection function.