Fangrui Product Details 1. Tk17 1.91 Inch Horizontal Screen Silicone Strap Smart Watch Supports Ecg Electrocardiogram 2. Main Control Chip: Realtek 8762d 3. Memory: 128mb 4. Screen Size: 1.53 Inches 5. Resolution: 320x380 6. Bluetooth Version: 5.1 7. Charging Method: Magnetic Charging 8. Waterproof Level: Ip68 Waterproof 9. Battery Capacity: 380mah 10. Machine Material: Alloy + Stainless Steel + Tp 11. Charging Time: 2-3h 12. Use Time: 4.5h 13. Support Android 4.4 And Above, Apple Ios9.0 And Above 14. Support Simplified Chinese, English, Japanese, Korean, French, German, Italian, Spanish, Russian, Portuguese, Swedish, Turkish, Polish 15. Support Ecg Measurement, Hrv Report, App Analysis Results 16. Bluetooth Call, Voice Assistant, One-click Sos Rescue 17. One-click Micro-physical Examination, Five Internal Organs Detection, Quick Assessment Of Physical Condition 18. Support Remote Care For Relatives And Friends, Multi-sports Mode, Custom Dial And Other Functions 19. 24-hour Continuous Dynamic Heart Rate Monitoring (with Liveness Detection Function), Body Temperature Monitoring, Stress Test, Independent And Accurate Blood Oxygen, Blood Pressure Monitoring, Sleep Monitoring And Other Health Monitoring Functions