Key Features:   GPS3 Always-On Retina display 30% larger screen Swimproof ECG app Electrical and optical heart sensors Built-in compass Elevation Emergency SOS Fall detection S5 SiP with up to 2x faster 64-bit dual-core processor Watch OS 6 with Activity trends, cycle tracking, hearing health innovations, and the App Store on your wrist Aluminum case Product Accessories Includes: Watch Series 5 Smart Watch Sport Band (can be configured for either S/M or M/L length) 1m Magnetic Charging Cable 5W USB Power Adapter Please Note: The ECG app is available with the latest versions of iOS and watchOS on Apple Watch Series 4 or later. See apple.com/watch for compatibility details. The ECG app is not intended for use by people under 22 years old Apple watch series 5 has a water resistance of 50 meters under ISO standard 22810:2010. Appropriate for shallow-water activities like swimming. Submersion below shallow depth and high-velocity water activities not recommended Apple Watch Series 5 requires an iPhone 6s or later with iOS 13 or later To use Emergency SOS, your iPhone needs to be nearby. If your iPhone isn't nearby, your Apple Watch needs to be connected to a known Wi-Fi network and you must set up Wi-Fi Calling Some bands are sold separately