NFC Smart Ring Couple Stainless Steel Finger Rings Technology Android Phone Equipment Multifunctional Magic Ring - White/6 Please read the size chart we provide care before purchasing NFC smart chip ring is a fashionable wearable electronic product that performs mobile phone functions and shares data through the connection of NFC radio frequency communication technology with mobile phone Place the smart ring within the NFC area of a smartphone to perform: screen unlocking,app lock unlocking,app quickly launching,name card and URL information sending and reading,etc. Quickly start the phone application,in advance will need to quickly start the program startup 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 unlock,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,and write the smart ring,only the ring touch the phone to start the application,to protect personal privacy No charge/depth waterproof,built-in ultra-sensitive DNF chip,no electricity to work,easy to wear This ring is a Christmas or birthday gift for men and fathers,suitable for parties,everyday wear or fashion occasions, Specifications: Material: Stainless steel Width: 8mm Package included: 1 x Smart Editable NFC Ring