H9 1.43 inch Steel Strap ECG Smart Watch Supports Bluetooth CallsSmart Voice Assistant 1. Main control chip: JL7013A 2. Memory: 128Mb 3. Screen size: 1.43 inches 4. Resolution: 466x466 5. Bluetooth: 5.3 6. Charging method: magnetic charging 7. Waterproof level: IP68 8. Battery capacity: 3.7V390mAh 9. Battery life: 5-7 days 10. Standby time: 20-30 days 11. Support Bluetooth calls, ECG monitoring, heart rate monitoring, blood oxygen monitoring and other functions 12. Incoming calls, high heart rate during exercise, application push, alarm clock, sedentary, goal achievement, low battery, Bluetooth disconnection reminder 13. Support simplified Chinese, Japanese, English, German, French, Spanish, Russian, Thai 14. Support mobile phone versions iOS10.0 and above Android 5.0 and above 15. It can track and analyze sleep signals 24 hours a day, analyze detailed sleep stages and cycles, sleep depth and duration, sleep efficiency, eyelid blinking, and even analyze short naps 16. Support real-time temperature monitoring and instant pressure tracking and monitoring