Outlined in a subtle rotating bezel it's easier to see and focus on what matters with an even bigger screen. Galaxy Watch3 is thinner and lighter than its predecessor with a sophisticated look and slimmed down frame. Check your blood pressure via the Samsung Health Monitor App without regularly needing a cuff. Before first use simply calibrate with a cuff then smart sensors measure your blood pressure through pulse wave analysis as you wear it. Check it daily to track trends and get reports right on your phone. Galaxy Watch3 uses red LED and infrared rays to estimate your SpO2 levels or the amount of oxygen in your bloodstream. Because this oxygen saturation is directly linked to physical performance you can use Galaxy Watch3 to push your routine to the next level. Galaxy Watch3 records your REM cycles deep sleep and total sleep time to score the quality of your rest. Samsung partnered with the National Sleep Foundation to include educational content and sleep tips right on your device to help you understand sleep better. Equipped with over 120 home workout programs to choose from Galaxy Watch3 helps you get your body moving on your time. Pick from your phone and cast to your TV – as you work out it'll display your heart rate in real time. Use the Ridge Sport Band for even more accurate stats.