1. Check whether the mobile phone has NFC function. Usually the NFC switch of the mobile phone is in the system settings of the mobile phone. If the user does not find such as the NFC function of the mobile phone, please contact the after-sales service of the mobile phone manufacturer or search on Baidu to see if the corresponding mobile phone model has NFC function, and confirm Mobile phone nfc signal area. 2. If the mobile phone has NFC function, after turning on the NFC switch, search for software about NFC function in the application software market, download and install it, and follow the prompts on the software. 3. Open the downloaded nfc software and follow the prompts on the software. 4. Because NFC belongs to near field communication, when reading any task, please make sure that the ring chip is facing the eye and close to the NFC signal area of the mobile phone, otherwise it may cause normal reading and writing. Then according to the mobile APP, function operation settings, matching, and establishment of shortcut function applications. 5. Supports NFC function smart fingerprint password lock, NFC smart attendance, needs to be matched, written tag information or number synchronization can be used Product description: This smart ring is a fashionable wearable electronic product that connects to a mobile phone through NFC wireless radio frequency communication technology to operate mobile phone functions and share data. It does not require any power supply and has high-level waterproof performance. The ring has a built-in NFC chip. You need your phone to have the nfc function to use it. Colour:B: Black Material:Stainless steel Package Contents: 1 x smart ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.