Specifications:
The smart ring through the nfc radio frequency communication technology, to achieve mobile phone function operation and sharing of data.
By touching the phone nfc signal area, to achieve the screen to unlock; application lock, quick start application, send read business cards, URL information and other functions.
Multi-functional NFC smart ring, the main function is to store and exchange personal information, as well as mobile content and personal privacy encryption unlock.
Support for Apple, for Samsung, for Huawei,for XIAOMI and other NFC-enabled mobile phone.
No need to charge , built-in ultra-sensitive NFC chip.

[Product name]: New NFC digital smart bracelet extreme controller smart wearable
[Product material]: stainless steel
[Product weight]: 7.5g
[Size]: 7,8,9,10,11,12 (please refer to the size chart)

Note:The smart ring only supports 213 chip door cards.

for Apple (ios) system needs Apple XR or above to use. You can directly search for NFC To'ols in APP s'tore to install apps

7 Size: inner ring circumference 56cm
8 Size: inner ring circumference 60cm
9 Size: inner ring circumference 64cm
10 Size: inner circle circumference 69cm
11 Size: inner circle circumference 73cm
12 Size: inner circle circumference 75cm