moreFit Fitness Tracker, M5 Plus Touch Screen Bluetooth Smart Bracelet Wristband (Black) Multiple functions: Blood pressure measurement and heart rate monitor, sleep monitor, call and message alert, silent alarm, movement tracker. Wide compatibility and long standby time: Supports Bluetooth 4.0, Android 4.4 or iOS 8.0 above. Battery lasts 5-7 days by heavy loading and 7-10 days by light loading. Track all-day step counter, including 14 activities to capture more precise heart-rate data, calorie consumed, distance and other stats even when disconnected with your phone. All day activity tracker: Record all day activities, steps , distances, calories burned, running mode, sedentary reminder and active time. Your purchase is backed by one year warranty and life time technical support. For any problem, please contact us in the first time with your order number.