The Zeblaze Stratos 3 Ultra is a ruggedized GPS smartwatch built for extreme environments and outdoor endurance. It features a vivid 1.43-inch AMOLED display protected by Corning Gorilla Glass, providing high visibility and scratch resistance. With its 5ATM water resistance rating and MIL-STD-810G military-grade durability, this watch is engineered to withstand high altitudes, moisture, and impact. 🏔️ This device integrates a high-performance GPS system for precise outdoor tracking and supports Bluetooth voice calling through a built-in speaker and microphone. Health monitoring capabilities include 24-hour heart rate, SpO2 (blood oxygen) tracking, and stress level monitoring. For athletes, it offers professional-grade sports modes and fitness data analysis. The high-capacity battery provides up to 45 days of runtime in battery-saver mode, ensuring reliability during long-distance expeditions. ⌚ YouTube Product Video: https://www.youtube.com/watch?v=bwJBEHG5AI0 Screen: 1.43 inch AMOLED, 466*466 pixels, 391 PPI, up to 1000nit brightness, Corning Gorilla Glass GPS Positioning: Integrated GPS/GLONASS/GALILEO/BDS/QZSS. Assisted GPS for fast fix times. Sensors: Compass, Gyroscope sensor, Geomagnetic sensor, Barometric altimeter, Acceleration sensor Health Monitor: Wrist Heart Rate Monitor, Pulse Ox Blood Oxygen Saturation Monitor Connection: BLE 5.3 Battery Capacity: 300mAh Li-polymer battery. Standby time in power-save modes: up to 45 days Training time in power-save modes: up to 24 days Full GPS run time: Up to 86hrs Charging Method: magnetic charging Theoretical Charging Duration: Approx. 1.5 hours Health Features: Activity Tracking, Heart Rate, Blood Oxygen, Sleeping Monitoring, Breathing Exercise, Menstrual Cycle Tracking, 120+ Sports Modes Lifestyle Features: Bluetooth Phone Calls, Controls Smartphone Music and Camera, Phone Call Notifications, SMS Notifications, App Notifications, Find My Phone, Time/Date, GPS Time Sync, Automatic Daylight Saving Time, Stopwatch, Timer, Alarm Clock, Weather Sync(Check weather in the next four days), Raise to Wake, Sedentary alert, Drink Water Reminder, Medication Reminder, Events Reminder APP: Zeblaze Fit (Android 4.4 or iOS 8.2 and above) Body Material: Zinc Metal Bezel+Drilling Carbon Coating Dimensions: 45.6 x 45.6 x 12.7 mm Weight: 56.5g with wristband Wristband: silicone, 22mm width, 130-235mm length