NFC stainless steel ring

Name: Stainless steel NFC smart ring Material: Stainless steel Process: polishing Size: 8mm Color: steel, black NFC smart ring application APP; support Android mobile phone NFC function use;   Product Description: This smart ring is a stylish wearable electronic product that uses nfc wireless RF communication technology to connect with mobile phones to operate and share data. It does not need any power supply and has high grade waterproof performance. The ring has built-in nfc chip. You need to have the nfc function on your phone to use it.   2. Specific operation: Smart ring realizes the screen tomb unlocking by touching the nfc signal area of the mobile phone; application lock; quick start application; sending read business card, website information and other functions.   Three. Instructions for use:   (1) First check whether the mobile phone has nfc function. Usually the mobile phone nfc switch is in the system setting o