STYLE YOU CAN COUNT ON: Galaxy Watch3 combines style?two sizes, two finishes, three colors and, 50,000 plus (1) watch faces-with military-grade durability (2) and water resistance (3). LEAVE YOUR PHONE BEHND: Galaxy Watch3 gives you the freedom to call, text, stream music and get notifications via Bluetooth connectivity HOLISTIC HEALTH MONITORING: Use your Galaxy watch to record ECG for 30 seconds similar to a standard single-lead ECG. (4) (All ECG functionality requires compatible Galaxy smartphone. (4)) The ECG Monitor app will also check the recording for signs of Atrial Fibrillation? a common form of irregular heart rhythm. (4)You can share the PDF report of your ECG recording with your health care provider using the Samsung Health Monitor app on your compatible Galaxy phone. BATTERY BUILT FOR ENDURANCE: The Galaxy Watch3?s long-lasting battery can go for more than a day (5) on a single charge, and you can always get a quick boost from your compatible Galaxy phone with Wireless Power Share (6). STROGER INSIGHTS. NEXT-LEVEL FITNESS: Spend your time moving while Galaxy Watch3 tracks seven popular activities automatically. Get more out of each movement thanks to built-in run coaching (7). LEVEL UP YOUR DOWNTIME: Galaxy Watch3?s automatic sleep tracker offers insights on how to get a better night?s sleep. It also monitors your stress level and helps you recenter with breathing guides. SMART WATCH. SMART LIFE: Integrated Bixby voice functionality (8) can read your texts, make a call or initiate coaching on command and on the go. Samsung Pay (9) lets you leave home without a wallet. And a multilayered defense-grade security platform keeps all your data safe. ANDROID/iOS COMPATIBLE: Pairs seamlessly with Android devices and select iOS devices (10). (1) Supported on both Android and IOS. (2) This device passed military specification (MIL-STD-810G) testing against a subset of 10 specific conditions, Including drops from 4.9 feet, extreme temperatures, dust, shock/vibration, and low pressure/high altitude. (3)Water-resistant up to 50 meters per ISO standard 22810:210. Not intended for scuba diving. Avoid excessive, sudden temperature changes and high-velocity activities. Rinse in fresh water/dry after use in sea water or chlorinated water. (4) Requires Samsung Galaxy smartphone with Android 7 or later, and Samsung Health Monitor app (available only at the Samsung Galaxy app store). (5) 45mm version lasts longer (56 hours) than 41mm version (43 hours). Average expected performance based on typical use. Results may vary. (6) Works with QI compatible Samsung devices (compatibility with non-Samsung QI devices not guaranteed); speed and power efficiency of charge varies by device. (7) This device and related software are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease. (8) Most Bixby voice functionality requires LTE or Bluetooth connection to a phone. LTE version requires initial setup for standalone use. (9) Samsung Pay is not available on iOS smartphones. After initial setup, Samsung Pay on Galaxy Watch3 can make at least five transactions without reconnecting to a network. Samsung Pay on Galaxy Watch3 requires network connection through LTE or Wi-Fi or via Bluetooth pairing with compatible smartphone. Samsung Pay on the Galaxy Watch3 is only compatible with select cards, carriers and Samsung devices and non-Samsung Android phones. Samsung Pay on the Galaxy Watch3 is compatible only with NFC-type payment terminals. (10) Compatible with select Bluetooth-capable smartphones. Galaxy Watch3-supported features may vary by carrier and compatible device.