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Contactless Payment Signet Ring - With Minimal Inductive NFC Antenna - Coil on Chip. : 4 Steps (with Pictures) - Instructables
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McLEAR [Official Store] RingPay - Contactless Payment Smart Ring/No Charging Required/Waterproof (5 ATM) / Scratch Resistant/Secure by Design/Always have payment on hand / (Size 10.5, Black): Amazon.co.uk: Electronics & Photo
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