NFC Multifunctional Waterproof Intelligent Ring Smart Wear Finger DigitalFeature: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)