100% brand new and high quality 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 accessiblePlace 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.Designed with IP68 Water-proof level ,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.Main Functions:Application Quick-Start : with start-up command written in the smart ring,when the smart ring touches the phone the apps will automatically start.Quick-Unlock : hand wear ring touch unlock,screen lock,application lock set (some phones need to ROOT,can use the function).Program Lock Ulock : select the application you want to lock / unlock,write the smart ring then touch the phone to start the application,to protect personal privacy.Information Sharing : 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.Specifications:Proauct name: NFC Smart RingMaterial: Stainless steelSize: 8/9/10/11Package Include: 1x NFC Smart RingNotePlease allow 2-3 cm difference due to manual measurement. Besides different computers display colors differently,the color of the actual item may vary slightly from the below images,thanks for your understanding(1 inch = 2.54 cm)