NFC access control function, you need your phone's own NFC chip to use the bracelet's access control function. Reminder for NFC function: 1. The NFC in this table only supports a frequency of 13.56MNZ as an IC door card (applicable to 80% of products in the market) and does not support other functions. 2. Mobile phones that support NFC function can directly read unencrypted door cards and write them into the watch. 3. The fingerprint lock enters administrator mode - add - write card. 4. The encrypted access control of the community needs to be written in the property management office of the community. Special features: You can upload pictures to customize wallpapers Phone book Making phone calls Heart rate monitoring Blood pressure monitor pulse oximeter Sleep monitor Multiple sports modes Pedometer Call or message reminder caller ID display Information push reminder (SMS/QQ/WeChat/Skype/Facebook/Twitter/Line/WhatsApp) Weather push Music control Automatically light up the screen Reminder type: Vibration Stopwatch Other features: alarm clock, sedentary reminder, camera remote control, anti loss. APP Name: FitCloudPro Function Introduction: CPU: RealTek8762DK BT - Version: BT 5.0 Compatible operating systems: Android 4.4 or above, iOS 9.0 or above Operation mode: full touch Waterproof: IP67 Screen size: 1.32-inch TFT Resolution: 360 * 360 pixels Battery capacity: 260 mAh Standby time: about 25 days Usage time: approximately 3-5 days Charging time: approximately 2.5 hours Power supply: 5V/1A Charging type: wireless charging