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Amazon.com: Apple Watch Series 7 [GPS 45mm] Smart Watch w/ (Product) RED Aluminum Case with (Product) RED Sport Band. Fitness Tracker, Blood Oxygen & ECG Apps, Always-On Retina Display, Water Resistant :
The Patent behind the Apple Watch Series 5 ECG Feature surfaced today at the U.S. Patent Office - Patently Apple
![watchOS 5.1.2 for Apple Watch now available with ECG app, new Infograph complications, more - 9to5Mac watchOS 5.1.2 for Apple Watch now available with ECG app, new Infograph complications, more - 9to5Mac](https://9to5mac.com/wp-content/uploads/sites/6/2018/12/ecg-apple-watch.jpg?quality=82&strip=all)