SOS call This smart watch has a built in SOS function that automatically sends alerts to predefined emergency contacts with a single button press. Safety is a core priority. Bluetooth calls and intelligent notifications Allows Bluetooth calls and notifications from apps so you can stay informed without touching your phone. Long lasting battery Equipped with a 530 mAh battery and an energy saving chip. It lasts over 20 days in standby and 3 to 7 days in normal use, reducing the need for frequent charging. Versatile fitness tracking Includes heart rate monitoring, pedometer and sleep monitoring to help you stay motivated and reach your goals. Use scenarios - Outdoor activities or daily emergencies: Use the SOS button for quick alerts, take calls from your wrist via Bluetooth, and monitor heart rate while keeping up with notifications. - Workouts and daily fitness: Track steps and heart rate during training, receive app notifications on the go, and review sleep data after workouts. - Travel or busy days: Minimize phone checks by viewing important notifications on the watch, while enjoying long battery life that covers multi day use.