Advanced Sleep & Continuous SPO2 Manage your overall sleep quality for a great night's sleep with an advanced tracker that calculates your sleep score. ECG Be smart about your heart with real-time ECG Monitoring that gives accurate readings. Fitness/Auto Workout Tracking Make the most of every workout with Auto Workout Tracking. Stay motivated by connecting to live coaching sessions via your smartphone VO2 Max / Advanced Run Coaching Make the most out of every mile with Advanced Run LTE Connectivity No phone or Wi-Fi? No problem. Stay connected wherever your workout takes you, thanks to LTE connectivity.* *4G LTE stand-alone connectivity only available on Samsung Galaxy Watch4 LTE / Galaxy Watch4 Classic LTE versions. Stand-alone voice calling and stand-alone text messaging on LTE version require initial pairing with an eligible Android 6.0 or later smartphone device and a separate qualifying wireless plan. Your carrier may not support stand-alone voice calling, or support may be available only in certain areas. Please check with your carrier for more information, Stand-alone functionality limited if paired phone is not powered on or connected to a wireless network.