Zeblaze Stratos 3 Ultra 1.43 inch Screen Rugged Outdoor Sports GPS Smart Watch 1. Screen: 1.43 inch AMOLED, 466x466 pixels, 391 PPI, up to 1000nit brightness, Corning Gorilla Glass 2. GPS Positioning: Dual-band GNSS & 5 Satellite Positioning Systems (GPS, GLONASS, GALILEO, QZSS, BDS). Assisted GPS for fast fix times. 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: 300mAh Li-polymer battery. 7. Standby time in power-save modes: up to 45 days 8. Training time in power-save modes: up to 24 days 9. Training time with full GPS: Up to 86 hours 10. Theoretical Charging Duration: Approx. 1.5 hours 11. Health Features: Activity Tracking, Heart Rate, Blood Oxygen, Sleeping Quality Monitoring, Breathing Exercise, Menstrual Cycle Tracking, 120+ Sports Modes 12. Lifestyle Features: Bluetooth Phone Calls, Controls Smartphone Music and Camera, Phone Call Notifications, SMS Notifications, App Notifications, Find My Phone, TimeDate, GPS Time Sync, Automatic Daylight Saving Time, Stopwatch, Timer, Alarm Clock, Weather Sync(Check weather in the next four days), Raise to Wake, Alarm Reminder, Events Reminder, Sedentary alert, Drink Water Reminder, Hand Washing Reminder 13. APP: Zeblaze Fit (Android 5.0 or iOS 12 and above) 14. Language Support: Watch System: English, Portuguese, Russia, Deutsch, French, Italiano, Spanish, Turkish, Polskie, Vietnamese. Zeblaze Fit APP: English, Portuguese, Russia, Ukrainian, Deutsch, French, Italiano, Spanish, Turkish, Polskie, Japanese, Korean, Indonesian. Message Push: English, Portuguese, Russia, Deutsch, French, Italiano, Spanish, Turkish, Polskie, Greek 15. Body Material: Zinc Metal Bezel+Drilling Carbon Coating 16. Dimensions: 45.6 x 45.6 x 12.7 mm 17. Weight: 56.5g with wristband 18. Wristband: silicone, 22mm width, 130-235mm length