Ochstin 5HK28 1.78 inch Square Screen Silicone Strap Smart Watch Supports Bluetooth Call FunctionBlood Oxygen Monitoring 1. Screen size: 1.78 inch display 2. Resolution: 368x448 3. Battery capacity: 240mAh 4. Waterproof grade: IP68 5. Strap: Silicone 6. System: Android4.4 and above ios9.0 and above 7. Bluetooth: 5.0 8. Charging method: Magnetic charging cable 9. Battery life: 30 days in standby, about 5-7 days in use 10. Charging time: about 2h 11. Support Chinese, English, German, Russian, Portuguese, Spanish, French, Japanese, Arabic, Dutch, Italian, Czech, Greek, Hebrew, Indonesian, Korean, Malaysian, Polish, Thai, Vietnamese, Finnish, Romanian , Turkish and Croatian languages. 12. Support Bluetooth calling, voice control, always-on screen, Alipay offline payment, NFC, password unlocking, female physiological cycle, custom dial, weather forecast, music control, pedometer, heart rate, sleep, sedentary, mileage, blood Oxygen, blood pressure, search, calories, message push and other functions