ET490 1.27 inch IP68 Waterproof Leather Strap Smart Watch, Support ECG 1. APP:Hband. 2. Main control chip: ultra-low power consumption 7013A 3. Body temperature sensor: contact body temperature sensor 4. Blood oxygen: infrared light + red light true blood oxygen 5. Gravity sensor: ROHM KXTJ3-1057 6. ECG chip: VP555ER 7. Optoelectronic chip: dual PD-VP555ER 8. Vibration: SilentVibration 9. Waterproof level: IP68 10. Compatible systems: Android 5.0 and above, ios10.0 and above 11. Health features: ECG function, non-invasive blood sugar measurement, blood component measurement (uric acid and blood lipid function) body composition, BMI and body fat measurement, HRV function, AI medical diagnosis Meter function, SOS emergency call function, body temperature monitoring, blood oxygen monitoring, blood pressure monitoring, breathing training, stress monitoring, women's health (menstrual tracking), heart rate monitoring, sleep monitoring, sedentary reminder. 12. Other functions: stopwatch, flashlight, countdown, step counting, calories, distance, sleep monitoring, exercise mode, incoming call reminder, alarm clock reminder, raising your hand to light up the screen, social sharing (WeChat, QQ, Facebook, Twitter), etc., shake Photography, music control, calculator, games. 13. Screen size: 1.27 inches 360x360 resolution full touch screen 14. Screen type: TFT 15. Bluetooth: 5.2BLE (low power consumption) 16. Battery type: high-density polymer lithium battery 17. Battery capacity: 200 mAh 18. Charging method: magnetic charging 19. Charging time: about 2-3H 20. Battery life: 3-7 days of use, 20+ days of standby 21. Control method: full-screen touch control, mobile APP control 22. 14 languages on the watch: Chinese, English, Japanese, Russian, German, Spanish, Italian, French, Portuguese, Polish, Korean, Traditional Chinese, Czech, Arabic 23. APP language: Russian, Hungarian, Turkish, German, Italian, Czech, Slovak, Japanese, French, Polish, Persian, Simplified Chinese, Tradit