Waterproof NFC IOS Android Windows Cellphone Magic Smart Ring NO Charging Battery For Quick Bondless Connection Wearable gadgets component that runs magic functions on mobile phone by achieving mobile function and sharing the data through NFC wireless frequency communication technology. Blended with rare metals,magnetite from volcano and far-infrared particles,contributing a lot to wearer's health. Your personal secret key. Random configuration of cellphone Apps locker and screen locker, which could only be unlocked by smart ring. Your magic business card. Sharing or editing image and business card information, compatible with Android, IOS and Windows mobile phones. NO need for battery from electromagnetic wave energy. Link sharing:information consulting, enabled by one click.