The NFC Ring can be used to unlock doors, mobile phones, transfer information. Through the NFC radio frequency communication technology and mobile phone connection to the mobile phone function operation and sharing of data. Smart ring by touching the phone NFC signal area, to achieve the screen to unlock, application lock, quick start application, send read business cards, URL information and other functions. It is a great gift choice for your loved ones. Features - Color: Transparent, gold. - Material: Stainless Steel. - Size: 8mm / 0.3inch in diameter. - Through the NFC radio frequency communication technology and mobile phone connection to the mobile phone function operation and sharing of data. - Smart ring by touching the phone NFC signal area, to achieve the screen to unlock; application lock; quick start application; send read business cards, URL information and other functions. - Multi-functional NFC smart ring, the main function is to store and exchange personal information, as well as mobile content and personal privacy encryption unlock, support for Apple, Samsung, Huawei, millet and other DNF-enabled mobile phone. - 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 will automatically find and start the program. - Touch unlock, hand wear ring touch unlocks, screen lock, application lock set (some phones need to ROOT, can use the function). - Lock / unlock the program, select the application you want to lock/unlock, write the smart ring, only the ring touch the phone to start the application, to protect personal privacy. - Touch the sharing / personal memorandum, you can store private content in the ring, you can also share the phone business card, wifi password, graphic information, etc., can also be used as a private memo to unlock the only way to unlock. - No charge/depth waterproof, built-in ultra-sensitive DNF chip, no electricity to work, easy to wear.