The Withings ScanWatch 2 38mm Black is a health tracking watch that uses a SpO2 sensor to monitor oxygen saturation, heart rate, breathing frequency, and movement all night long. A high level of breathing disturbances can be an indicator of sleep apnea. It features a long-life rechargeable battery that lasts up to 30 days, allowing for continuous health tracking. The watch also includes proactive health tracking with advanced sensors, regulatory-compliant health metrics, and automatic sync. Additionally, it tracks day and night temperature to monitor the onset of illness or other health conditions. The watch has a TempTech24/7 module that delivers best-in-class body temperature variation assessment. It also provides heart health notifications, including high and low resting heart rate and irregular rhythm. On-demand checks include ECG measurement, AFib detection, and blood oxygen level. The watch is designed for women and men and is water resistant to 5 ATM. It automatically recognizes 40+ activities and provides advanced sleep monitoring with detailed analysis.