Zeblaze Stratos 4 Rugged Outdoor GPS Smart Watch 1.43 inch Screen 5 ATM & IP69K 1. Screen: 1.43 inch AMOLED, 466x466 pixels, 391 PPI, up to 1000 nit Brightness，Corning Gorilla Glass Screen Material 2. GPS: Built-in GNSS & 6 Satellite Positioning Systems (GPS, GLONASS, GALILEO, NAVIC, QZSS, BDS) 3. Sensors: Compass, Gyroscope sensor, Geomagnetic sensor, Barometric altimeter, Acceleration sensor 4. Health Monitor: Wrist Heart Rate Monitor, Pulse Ox Blood Oxygen Saturation Monitor 5. Connection: BLE 5.3 6. Battery Capacity: 500mAh Li-polymer battery. 7. Working time in Battery Saving Mode: up to 60 days 8. Working time in Typical Usage Scenario: up to 30 days 9. Working time in Heavy Usage Scenario: Up to 18 days 10. Theoretical Charging Duration: Approx. 1.5 hours Magnetic Charging 11. Health Features: Activity Tracking, Heart Rate, Blood Oxygen, Sleeping Quality Monitoring, Breathing Exercise, Menstrual Cycle Tracking, 170+ Sports Modes 12. Lifestyle Features: Bluetooth Phone Calls, Voice Assistant, Controls Smartphone Music and Camera, Phone Call Notifications, SMS Notifications, App Notifications, Find My Phone, World clock, TimeDate, GPS Time Sync, Automatic Daylight Saving Time, Stopwatch, Timer, Alarm Clock, Weather Sync, Flashlight, Calculator, Password Setting, Raise to Wake, Power Saving Modes, Do Not Disturb Modes, AOD Modes, Screen Locked Modes, Slient Modes 13. APP: GloryFitPro (Android 5.0 or iOS 11 and above) 14. Language Support: Watch System: English, Portuguese, Russian, Polish, Spanish, French, Italian, German, Dutch, Turkish, Bengali, Indonesian, Thai, Czech, Hebrew, Hungarian, Romanian, Vietnamese, Finnish, Norwegian, Swedish, Danish, New Zealand, Greek, Arabic, Ukrainian, Korean, Japanese, Simplified Chinese, Traditional Chinese APP: English, Portuguese, Russian, Polish, Spanish, French, Italian, German, Dutch, Turkish, Bengali, Indonesian, Thai, Czech, Hebrew, Hungarian, Romanian, Vietnamese, Finnish, Norwegian, Swedish, Danish, New Zealand, Greek, Arabic, Ukrainian, Korean,