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Jakcom R3 R3F Timer Smart Ring New Technology Magic Finger For Android NFC Phone | eBay
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New Jakcom R4 Waterproof High Speed Nfc Id Ic Card Input Smart Ring Electronics Support Ios Android Wp Phone Small Magic Ring - Rings - AliExpress
JAKCOM R5 Smart Ring Multifunction Smart Wear Ring, Size:S
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JAKCOM R5 Smart Ring
Jakcom R3 Smart Ring CNC Metal RFID NFC 125khz 13.56mhz IC/ID Rewritable | eBay