The Withings ScanWatch Horizon has launched in the US for US$499.95. The device builds on the ScanWatch, with a more elegant design. A rotating stainless steel bezel doubles as an ECG monitor, plus the gadget has a medical-grade SpO2 sensor. Health tracking features such as activity and sleep monitoring are also available on the watch.
https://www.notebookcheck.net/Withings-ScanWatch-Horizon-with-medical-grade-SpO2-sensor-launches-in-the-US.620861.0.html