ASUS VivoWatch BP (HC-A04A)   Your intelligent companion for easier health management   Durable and stylish ceramic case — Extremely tough and scratch-resistant, yet adds a touch of refined elegance to any wrist Embedded ECG and PPG sensors — Track real-time health data including heart rate, sleep, activity, exercise and de-stress level (HRV score) to stay informed about your health ASUS HealthConnect app – An intuitive and friendly mobile app that allows users to manage blood pressure and heart-rate data as well as other wellness data for easy health management ASUS HealthAI technology — An exclusive algorithm in the ASUS HealthConnect app enables personalized health advice and health management tips based on health measurements and personal habits Built-in GPS sensor — Track workouts and view activity maps and stats, such as speed, distance and duration in the intuitive ASUS HealthConnect app 28-day battery life — Your 24/7 assistant makes health-trend tracking and management convenient and hassle-free Display High-reflective color LCD Sensor G sensor PPG (photoplethysmography) & ECG (electricalgraphy) sensors Built-in GPS sensor Bluetooth Bluetooth 4. 2 or Later (connect to android and iOS phone) Sync Android 4. 4 or Later iOS 11. 0 or Later. Power Consumption   Water resistance IP67 Strap Size 20mm (medical grade silicone) Weight 45g Battery 28-day battery life Wireless Charging   LED Light   Material   Features Wellness: (1) step (2) calories burned (3) sleep quality (sleep time, flips times, average heart rate, comfort sleep index) Health management. : (1) Heart rate (2) De-stress level (3) PTT index Activity & exercise: (1) Exercise and background heart rate (2) Exercising speed and distance.