K63 1.96-Inch Heart RateBlood Oxygen Monitoring Bluetooth Call Sports Smart Watch 1. System requirements: Android 4.4 and above, iOS 8.0 and above 2. Functions: Bluetooth callsBluetooth music (super clear sound quality), weather display, heart rate detection, blood pressure detection, blood oxygen detection, time display, step counting, compass, calories, distance, sleep monitoring, stopwatch, alarm clock reminder, incoming call notification , information reminder, remote photography, sedentary reminder, multi-sport mode 3. Supported languages: English, Chinese, Japanese, German, French, Spanish, Arabic, Russian, Ukrainian, Russian, Portuguese 4. Main control chip: Realtek 8763EWE-VP 5. Bluetooth version: 5.0 6. Memory: Flash 128MB 7. Screen size: 1.96 inches 8. Screen resolution: 320 x 386 9. Heart rate: 3605 10. Speaker: 0916 11. Motor: built-in, vibration reminder 12. Battery capacity: 380 mAh 13. Standby time: about 30 days 14. Working time: about 5-10 days 15. Waterproof level: IP68 16. Operation mode: touch + button 17. Strap circumference: 150-260mm 18. Dial size: 42 x 12.2mm