Key Features . Aluminium CaseSleep TrackingHealth and; fitness tracking1.36 DisplayWater resistant to 5ATM + IP68Only compatible with Android devices . Don\'t just listen to your body. Know it.Track your fitness progress with our first smartwatch that conveniently measures body composition. Get to know your body fat percentage skeletal muscle body water and more to achieve your goals. The Samsung BioActive Sensor and our fastest chip brings the biggest innovation to Galaxy Watch yet. Your workout buddies have your backEnjoy every step you take with your friends and family with the Galaxy Watch4. Track your steps and compete with friends in a fun competition through a live message board. Challenges come with commemorative badges and a point system to make exercise fun motivating and socially rewarding. Name a workout. It can track it.Track your activities and fitness scores on your watch and phone. Count steps check calories and stay on the grid with GPS. Galaxy Watch4 detects physical activity to track your routines and supports more than 90 exercises for a more accurate report of your workouts. All the data your heart desiresMeet the Samsung BioActive Sensor that measures ECG and blood pressure in real time. After initial calibration the sensors quickly check your blood pressure. You can also check abnormal heart rate and rhythm through ECG and send data straight to your phone to be easily shared. The most holistic sleep analysis on Galaxy watchThe sleep tracker detects and holistically analyses your sleep stages while you rest. Improved measuring options let you check your blood oxygen levels and snoring patterns (not saying you do). Plus get advanced insights from the National Sleep Foundation for better sleep quality and duration. Sleek seamless iconicGalaxy Watch4 features a simple design with a streamlined Armour Aluminium metal frame. It offers high-end looks and functionality for your workouts and day-to-day tasks. It\'s a real team playerThe first smartwatch with Wear OS Powered by Samsung Galaxy Watch4 puts seamless access to your favourite apps on your wrist. You\'ll get a rich app selection from music streaming apps to anything in the massive library of health and fitness apps..