Zeblaze Stratos 2 1.3 inch AMOLED Screen Smart Watch, Support Sleep Monitoring Heart Rate Monitoring 1. Waterproof: 5 ATM (50M) 2. Display size: 1.3-inch always-on AMOLED display, support always-on mode 3. Display resolution: 360*360 pixels, 326 PPI, 85.2% screen ratio 4. Bluetooth: BLE 5.0 5. Battery capacity: 300 mAh Li-polymer battery 6. Battery life power saving mode: up to 25 days 7. Typical usage scenario: up to 15 days 8. Heavy usage scenarios: up to 10 days 9. GPS continuous use scene battery life: up to 40 hours 10. Charging time: about 1.5 hours 11. Smartphone Compatibility: Android 4.4 or iOS 8.2 and above 12. System supported languages: English, Portuguese, Russian, German, French, Italian, Spanish, Turkish, Polish, Japanese (Language availability may vary by region. More languages ??will be provided via OTA) 13. InfoWear APP supports languages: English, Portuguese, Russian, German, Spanish, French, Italian, Japanese, Korean, Malay, Polish, Greek, Thai, Romanian, Bulgarian, Hungarian, Turkish English, Czech, Slovak, Danish, Norwegian, Swedish, Tagalog, Ukrainian, Vietnamese, Dutch, Croatian, Arabic, Indonesian 14. Supported languages ??for message push: English, Portuguese, Russian, German, Spanish, French, Italian, Japanese, Korean, Malay, Polish, Greek, Thai, Romanian, Bulgarian, Hungarian, Turkish English, Czech, Slovak, Danish, Norwegian, Swedish, Tagalog, Ukrainian, Vietnamese, Dutch, Croatian, Arabic, Indonesian 15. Functions: time date, GPS time synchronization, automatic daylight saving time, alarm clock, stopwatch, countdown, wrist based heart rate (constant, per minute), daily resting heart rate, abnormal heart rate alarm, SpO2 level measurement, VO2 maximum, sleep score and insight, calorie burning tracking, smart notification (phone, SMS, Gmail and smartphone app notification), weather (view the weather for the next four days) Control smartphone music and camera, find my phone, find my watch, do not disturb mode, mobile reminder, activity record, pedometer, standing, mobile bar (displayed on the de