NFC Multifunctional Waterproof Smart Digital Ring Unisex $ 4.92 Specification: Product name: New mobile phone accessories technology smart ring new NFC digital smart bracelet supreme controller smart wearable Product material: Stainless steel Product size: Face width 8mm Product weight: 7.5g Size: 6,7,8,9,10,11,12,13 Packing list: Ring x1