Built-in NFC chip multi-functional smart ring, continuous iteration of fingertip smart things, functions: APP entry, sending SMS, electronic business card, address location, entry phone number, flashlight, website link, memo, mobile phone volume, alarm clock setting, Bluetooth switch, WIFI switch. Touch the NFC function of the mobile phone, quickly make a call, sense the NFC connection of the touch mobile phone, touch the connection, and unlock the new posture of the mobile phone. The smart lock can replace the card to open the door. The smart ring only supports 213 chip door cards, and can be entered into various APP quick start programs. Under static atmospheric pressure, the index is as high as 100M to easily cope with diving challenges. The simple design creates vision, remote control, trend, and breaks through the limitations of traditional electronics to achieve the effect of small equipment and multi-function.