Combining the aesthetics of an analog watch with the functionality and ‘smarts’ of a connected device, Skagens Hybrid HR models offers the best of both worlds Notifications: Alarm Clock, App Alerts, Calendar Alerts, Email, Multiple Time Zones, Social Media, Text Functions: Activity Tracker, Challenge Friends to a Workout, Control Your Music, Customizable Buttons, Date, GPS, Heart Rate Tracking, Interchangeable Watch Band, Notifications, Personalize Your Dial, Sleep Tracker, Visualized Workout Routes Connectivity: Bluetooth Smart Enabled / 5.0 Low Energy Compatibility: Skagen Smartwatches work with phones running the latest version of Android or iOS. Supported features may vary between countries with compatibility subject to change.  Battery Life: 2+ Weeks **Based on usage** Case Size: 42MM Dial Color: Black Interchangeable Compatibility: 22MM Operating System: Skagen Connected (Hybrid App) Platform: JORN 42MM HYBRID HR Sensors: Accelerometer, Heart Rate Storage: 16MB Strap Width: 22MM Water Resistance: 3 ATM Battery Charge Time: Charge Time 60 min to 80%