Nfc Tag Smart Ring Wearable Smart Rings Finger Digital Ring For Android Phone (transparent #11) Explain that the NFC ring can be used to unlock doors, mobile phones, and transmit information. Through NFC radio frequency communication technology and mobile phone connection, mobile phone function operation and data sharing are realized. The smart ring can unlock the screen, lock applications, quickly launch applications, send read business cards, and URL information by touching the NFC signal area of the phone. It's a great gift choice for your loved ones. Color: Transparent, gold. Material: Stainless steel. Through NFC radio frequency communication technology and mobile phone connection, mobile phone function operation and data sharing are realized. Intelligent ringing is achieved by touching the NFC signal area of the mobile phone to unlock the screen; Application locking; Quickly launch applications; Send read business cards, URL information, and other features. The multifunctional NFC smart ring is mainly used to store and exchange personal information, as well as encrypt and unlock mobile content and personal privacy. It supports DNF enabled phones such as Apple, Samsung, Huawei, and Xiaomi. To quickly start a mobile application, it is necessary to quickly start the program startup command written in the smart ring in advance. When the smart ring touches the phone, it will automatically find and start the program. Touch unlock, touch unlock with a ring on your hand, screen lock, application lock settings (some phones require ROOT, which can be used). Lock/unlock the application, select the application to lock/unlock, and write a smart ring. Only when the ring touches the phone can the application be launched to protect personal privacy. Touch Share/Personal Memo to store private content in the ring, share phone business cards, wifi passwords, graphic information, and more. It can also be used as the only way to unlock personal memos. No charging/deep waterproof, built-in ultra sensitive DNF chip, no power work, easy to wear.