Garmin Vivoactive 4s GPS Smartwatch - Black

See your body's energy levels throughout the day, so you can find the best times for activity and rest. See how you're breathing throughout the day, during sleep and during breathwork and yoga activities. The Pulse Ox sensor gauges your blood oxygen saturation during the day and as you sleep to show how well your body is absorbing oxygen. Get a full picture of how you're sleeping with a breakdown of your light, deep and REM sleep stages as well as Pulse Ox and respiration data.