Special Feature Fitness Tracker, Phone Call, Sleep Monitor, Blood Oxygen (SpO2) Monitor, Heart Rate Monitor, Calorie Tracker, Alarm Clock, Stopwatch, Timer, Pedometer, Camera Control, Music Playback/Control, Sedentary Reminder, Weather, Waterproof, Notifications., 1)Fashionable Full Touch Screen Design with classic screen and HD glass screen (color on-screen display) 2)Adjustable grade silicone strap is healthy, environmentally friendly, and very comfortable to wear. 3)Excellent hiking watches / outdoor watch 4）All-day activity tracker. (Distance / steps / calories) 5）fitness tracker (breathing training / blood oxygen / heart rate / sleep monitoring)