100% brand new and high quality This product supports the use of the NFC function of the Android system mobile phone Feature: The smart ring is a fashionable and wearable electronic product with NFC chips. It`s able to connect to a smart phone to complete function performing and data sharing, that way many playful and convenient function will be accessible Place the smart ring within the NFC area of a smartphone to perform: screen unlocking, app lock unlocking, app quickly launching, name card information reading, etc. Designed with Water-proof , you can wear it in all scene such as hiking, running and even swimming, but it`s supposed to be wiped dry to avoid the residual moisture in the ring soak your finger skin for long hour. It can be used without any power supply, very convenient. Specific operations: By touching the nfc signal area of the mobile phone, the smart ring can unlock the screen; lock the application; quickly start the application; send and read business cards, website information and other functions. Instructions for use: (1) Please check whether the mobile phone has nfc function, usually the mobile phone nfc switch is in the system settings of the mobile phone, and confirm the mobile phone nfc signal area. (2) If the mobile phone has the nfc function, after turning on the nfc switch, search for the software about the nfc function in the application software market, download and install it, and operate according to the prompts on the software. (3) Open the downloaded nfc software and operate according to the prompts on the software, (4) Since nfc belongs to near field communication, when reading any task, please make sure that the position of the ring chip is close to the nfc signal area of the mobile phone, otherwise it may cause the situation that the reading and writing cannot be performed normally. Then according to the mobile phone APP, function operation settings, matching, and establishing a shortcut function application.(5) Support NFC function smart fingerprint password lock, NFC smart attendance, need to match, write tag information or number synchronization can be used. Proauct name: NFC Smart Ring Material: Stainless steel Size:6/7/ 8/9/10/11 Package Include: 1x NFC Smart Ring Note: Besides different computers display colors differently, the color of the actual item may vary slightly from the below images, thanks for your understanding