Heart Rate Blood Oxygen 2.02” AMOLED Display 100+ Workout Modes Assisted GPS On-wrist Calling All-day Activity Daily activity tracking helps record calories burned and steps walked with continuous heart rate sensor; sleep tracking and milestone awards to keep you motivated and accountable to improve daily health. Sleep Monitor Monitor your REM when you wear it to sleep. It will tracks your rapid eye movement to provide better sleep data. Heart Rate & Blood Oxygen Track your Blood Oxygen and Heart Rate through out the day for a better healthier exercise. 2.02” HD AMOLED Touch Screen 2.02" Large AMOLED Display Notifications Receive and read text messages, social media notifications, calendar alerts, incoming and missed call alerts to never miss an important moment. (quick reply functions available for Androids) On-Wrist Bluetooth Calling With On-Wrist Bluetooth Calling, you can take and make calls directly from your watch for effortless hands-free communication. Assisted GPS Workout The GPS-assisted workout mode on your 3M watch tracks your location in real time, providing you with precise data on the distance, speed, and route of your workout.