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