C20 1.71 inch TFT HD Screen Smart Watch, Support Heart Rate MonitoringBlood Oxygen Monitoring 1. Main control platform: 8762DK 2. Memory: 128M 3. Display: 1.71-inch TFT high-definition square screen, resolution: 280*320 4. Bluetooth: BT 5.0 5. Heart rate: HRS3690 6. Pedometer: Silan Micro SC7A20 7. Charging method: 2PIN magnetic wire 8. Battery: capacity 380mAH (polymer pure cobalt battery) 9. Waterproof grade: IP68 10. Compatible system: Android 6.0 or above, IOS9.0 or above system version 11. Watch menu language: English (default), Simplified Chinese, Japanese, Korean, German, French, Spanish, Arabic, Traditional Chinese, Russian, Italian, Portuguese, Ukrainian, Turkish, Romanian a total of 15 countries 12. Da Fit APP languages: English, Simplified Chinese, Japanese, Korean, German, French, Spanish, Arabic, Russian, Traditional Chinese, Ukrainian, Italian, Portuguese, Dutch, Polish, Swedish, Finnish Language, Danish, Norwegian, Hungarian, Czech, Bulgarian, Romanian, Slovak, Latvian, Indonesian, Thai, Turkish, Vietnamese, Hindi, Pashto, Lithuanian, Estonian , Slovenian, Croatian, Greek, Filipino, Hebrew, Malay, Serbian, Persian 13. Functions: Step counting, sleep monitoring, heart rate monitoring, exercise, blood pressure monitoring, weather, camera control, blood oxygen monitoring, music control, theater mode, stopwatch, alarm clock, timer, sedentary reminder, breathing training, message, brightness Adjustment, mute, QR code, split screen function, multi-sport modes (walking, running, cycling, skipping rope, badminton, basketball, soccer, swimming, tennis, rugby, golf, yoga, gym, dancing, baseball, elliptical machine , rowing machine, trail running, skiing, bowling, dumbbells, sit-ups, free training, mountaineering), message and call reminders, call rejection, WeChat sports, weather, etc. 14. Dimensions: 54.8x43.5x14.8mm 15. Strap: silicone strap, 20mm width, total strap length 265mm, adjustable area 170-248mm 16. Net weight: 56.2g