Main functions: heart rate monitoring, step counting, calories burned, distance traveled, realtime clock display, automatic sleep monitoring, call reminders, information push, alarm reminders, antilost alert, remote camera control, and more. Activity and sleep tracking: records daily steps, distance, active time and calories; view and share your data on your phone. Sleep monitoring shows trends, duration and quality. Includes heart rate and blood pressure monitoring. Remote camera and antilost: use the wristband to trigger your phone camera remotely. Antilost alerts vibrate when your phone moves beyond about 5 meters. Connectivity and reminders: automatic alerts for Bluetooth disconnects or outofrange events. Sedentary reminders prompt you to move after long periods of sitting. Notifications and charging: receive SMS, call and information reminders on your wrist. Bluetooth wireless synchronization means no cables for data transfer. USB direct charging for convenience. IPX7 water resistance (not suitable for swimming or showering). Design and compatibility: compatible with iOS and Android devices via Bluetooth. Lightweight, adjustable silicone strap with a clear screen and reliable performance. Use scenarios: 1) Daily fitness and sleep insights to improve health and routine. 2) Office or travel reminders to stand up and stay active. 3) Quick remote photo capture during outings without reaching for your phone.