Welcome to our store Brand New and High Quality NFC Smart Ring (Only NFC-enabled devices are supported) Material: Stainless steel Size: ,6,7,8,9,10,11,12uff0c13,14 Chip: NFC chip Working frequency band: 13.56 MHZ Functions: Set up smart lock, card recharge, Smart phone unlock, Phone important file lock, files. No load, programmable read-only lock function, 7-byte serial number clone protection Specifications: 1, Lock and unlock your smartphone or tablet quickly, hide the app when you leave your smartphone alone 2, share & amp; Transfer information (send the private message Photo business card website link to the person you want to share by a simple touch) 3, Control Applications (you can write a fixed process list ahead of the time, and the ring will start the applications every time by just touch. 4, Water resistant and No charging required 5, quickly start the phone application, in advance will need to quickly start the program startup command written in the smart ring, when the smart ring touches the phone automatically find and start the program. 6,multifunctional NFC smart ring, the main function is to store and exchange personal information, as well as unlock mobile content and personal privacy encryption, support for Apple, Samsung, Huawei, millet and other DNF-enabled mobile phone. Package Included: 1 * Smart Ring Notes: Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement.