Hybrid Smartwatch with Heart Rate, SpO2, Activity and Sleep tracking - ScanWatch | Withings
Withings does the hybrid smartwatch right with the Steel HR | TechCrunch
Amazon.com: Withings Steel HR Sport Hybrid Smartwatch (40mm) - Activity, Sleep, Fitness and Heart Rate Tracker with Connected GPS, Smart Notifications, Water Resistant with 25-Day Battery Life : Electronics
Withings ScanWatch review: A hybrid smartwatch with ECG