FunLife TW68 Waterproof Fitness Tracker with Blood Pressure Heart Rate Monitor Smart Bracelet Bluetooth Activity Tracker Pedometer for IOS Android Unique fall down reminder, when parents go out and accidentally fall down, the smart bracelet will notify your phone to call emergency, which is a good partner of the older. Host comes with a standard USB port, special design to charge through connecting PC and mobile driver. Monitor your blood pressure / heart rate / sleep quality in real time, helping you know the health index and keep fit. Fit for above of Android 4.4 and iOS 8.0 smart phones. The first smart bracelet of blood pressure measurement with heart rate / sleep monitor, including fall down reminder. 1. Charge: Please ensure the charging pins are directed at the back of bracelet. Because wrong position can cause contact problems. 2. App download: Firstly make sure the Apple phone is with ios 8.0 or above. And the customer can download the corresponding app from apple store by searching "smart bracelet". Please note: When the customer firstly uses the bracelet, make sure it is full power, if not, please charge it at full. And when the bracelet works first time, it may remind them of upgrade. Please upgrade it at full power. 3. Monitor sync: Please make sure the bracelet is connected with app in mobile phone. Only if they are connected, the bracelet will sync, including time. Then it will work for record and analyze.