1. Material: zinc alloy + ABS/PC 2. Screen: 1.28 inch IPS color screen 3. Battery capacity: 200mAh 4. Band memory: 128M bit flash, 160k byte ram 5. Bluetooth version: 5.0 6. System requirements: Android 4.4 and above, IOS 8.0 and above 7. Standby time: 20-25 days 8. Working time: about 7 days 9. Charging interface: magnetic charging stand 10. UI languages: Chinese, English, Korean, Japanese, German, Spanish, French, Italian, Portuguese, Arabic, Russian, Dutch, Indonesian, Hindi, Polish, Turkish 11. Bracelet font language: Chinese, English, Korean, Japanese, German, Spanish, French, Italian, Portuguese, Arabic, Russian, Dutch, Indonesian, Hindi, Polish, Turkish 12. APP supported languages: English, Arabic, Czech, Dutch, French, German, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese , Turkish 13. Functions: 24 exercise modes, heart rate detection, blood pressure detection, blood oxygen detection, pedometer, calories, distance, sleep monitoring (sleep time, sleep quality), GPS track exercise, call reminder, message content push, find mobile phone , Sedentary reminder, alarm clock reminder (5 pcs), reminder to drink water, reminder to take medicine, shake to take pictures, female physiological reminder, call rejection, etc. 14. Size: diameter 4.4cm, thickness 1.1cm