Features: 100% new brand and high quality Program Lock: Your mobile phone only opens for you. User can select a program to be locked from the menu of "program lock". After the program is locked user should contact the mobile phone with smart ring to run the program. Automatic Running: Convenient and fast fashionable experience. User can select one or multiple programs in the edition menu of "automatic Running" and design operation scripts. User can operate it in corresponding Smart ring. Magic Business Card: Leave your contact information stylishly. User can edit the content of business card and write in the content. When the ring enters the NFC range of other mobile phones the card will automatically import. Link Share: Information consulting enable by one click. Whisper: Communication requires just one interaction. Start Hide: The highest level personal privacy protection. Network disk sharing: Goods shoulde be shared. The key of intelligent door: One-key opening convenient and safe. Screen unlock: Fast opening fancy experience. Dual Core Chip: Super sensitivity super reading and writing capacity instant transmission. Lightweight compact and portable. Made of high quality titanium alloy durable. Special design very fashionable. Specifications: Material: Titanium alloy Color: Black Size(Inner diameter): 7#(18mm) 9#(20mm) 11#(22mm) Wireless range: 1.5cm Wterproof grade: IP68 Carrier frequecy: 13.5MHz Net weight: 30g Package includes: 1 * Smart Ring