Asus VivoWatch SP HC-A05 Health Tracker . Key Features . Track your steps monitor your heart rate and more!Embedded ECG and PPG SensorsUp to 14-day battery lifeBuilt-in GPS to track activity and share your location!iOS and Android CompatibleWater resistant to 50 metresYour health in harmonyASUS VivoWatch SP is an intelligent wearable health tracker that offers 24/7 health and fitness monitoring and insights to help you maintain a healthy lifestyle and achieve fitness goals. Together with the ASUS HealthConnect app you can track blood pressure heart rate exercise sleep and a variety of other health categories in an intuitive and easy way. Exclusive ASUS HealthAI technology then provides personalised health-management tips based on health measurements manual recording and personal habits. Exercise heart rate and pulse transit time (PTT)VivoWatch SP features a pair of electricalgraphy (ECG) and photoplethysmography (PPG) sensors enabling it to calculate pulse transit time (PTT) as well as measure heart rate sleep and activity and stress levels throughout the day giving you a variety of insights for better health management. Personalized sleep-quality analysisVivoWatch SP tracks your sleep duration and quality giving you insights to help you get your best night\'s sleep. By tracking your heart rate in the background VivoWatch SP can determine when you are winding down and begin automatically tracking your sleep. It also uses your pulse oxygen and heart rate measurements to determine how deep and restful your sleep is. Movement throughout the night is another indicator of sleep quality so VivoWatch SP tracks your motion and records how many times you turn from side to side each night. Stylish and convenientWith a universal design that accepts standard quick-release watch bands you can easily change the look of VivoWatch SP to match your personal style and fit any occasion. VivoWatch SP also features a variety of attractive watch faces to choose from giving you more options to create a watch that\'s truly your own..