Replace "door key", "Payment Card" or other "IC" / "ID" cards.
No need to charge and waterproof, dust proof & fall proof.
Compatible with all IOS and Android Windows cellphone which have NFC
Share & Transfer information (send the private message/Picture/business card/ website link to the person you want to share by a simple touch).
Control Applications (you can write a fixed process list ahead of the time, and the ring will start the applications each time by simply touch.)
You can use the ring as ID and IC cards. Because ring can copy ID and IC card messages.
Color: As same as picture.
|Ceramic, or with metal|