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Tebru NFC Multi-function Smart Ring, NFC Multi-function Smart Rings Magic Wearable Device Universal for Mobile Phone, Multi-function Smart Ring - Walmart.com
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Fashion Men's Ring Magic Wear NFC Smart Ring Finger Digital Ring for Android phones with functional couple stainless steel ring _ - AliExpress Mobile
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RFID / NFC Smart Ring - Size 9 - NTAG213 : ID 2803 : $44.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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