Juboury I5 Plus Wireless Fitness Tracker Band Bluetooth Sports Bracelet with Pedometer Sleep Monitoring Calories Track for Daily Activity and Sleep (Blue) Data Sync:With designed app "Zeroner Health" to sync data. Recording your daily activities more easily. Detachable and Ultimate:Built-in USB Charging,Portable and Detachable for use More Functions:Designed for Healthy Life: Calories Tracking; Sleep Monitor; Silent Alarm by vibration; Sedentary Remind App messages notification: Show Content of Facebook, Twitter etc; Call ID display,SMS content Compatibility:Only for Smart Phones which with Bluetooth 4.0/4.0+, suitable for Android 4.3 or higher devices and iOS8.0 or above devices