Heart Rate Blood Oxygen Track Fitness 24 Workout Mode Built-in 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. 1.72" Full Touch Screen 1.72" Large TFT 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) Sleep Monitor Monitor your REM when you wear it to sleep. It will tracks your rapid eye movement to provide better sleep data. Blood Oxygen Track your Blood Oxygen and Heart Rate through out the day for a better healthier exercise. On-Wrist Bluetooth Calling With On-Wrist Bluetooth Calling, you can take and make calls directly from your watch for effortless hands-free communication. Workout Modes Multiple workout modes for activities such as lifting and cardio help track your performance so you can smash your fitness goals. Built-in GPS Whether you’re going on your morning jog or exploring new trails, our built-in GPS will help guide you every step of the way.