Features:Heart rate monitorRecord your heart rate, This built-in professional sensor help know your physical condition better.Daily activity trackerHelp track your workouts like steps, distance, calories burned, sleep quality, sedentary reminder, etc.Support smart notification functionSupport smart notification, never miss your phone call, text and social message with the notifications.Compatible with Android and iOS devicesCompatible with iOS 8.0 or above and Android 4.4 (with Bluetooth 4.0)