1. System requirements: Android 5.0 and above, IOS 10.0 and above 2. Charging head specifications: charging 1A or below 1A 3. Charging time: 2H 4. Bluetooth version: Bluetooth 5.0 5. Main control: RTL8762DK 6. Memory: 256KB+192KB (Flash 64MB) 7. Screen display: 1. inch, resolution: 360*360 8. Battery capacity: 200 mAh 9. Standby time: 30 days 10. Working time: 5-7 days 11. Waterproof rating: IP68 12. Sensor: gravity sensor/heart rate sensor 13. Material: metal texture case + silicone strap 14. Push supports 23 languages: Chinese, English (default), German, French, Italian, Spanish, Japanese, Polish, Russian, Portuguese, Vietnamese, Korean, Arabic, Hebrew, Thai, Croatian , Turkish, Czech, Dutch+Indonesia, Malaysian, Finnish, Greek, Romanian 15. Function: heart rate detection, blood pressure detection, blood oxygen detection, time display, step count, calories, distance, heart rate, sleep time, switch display, multiple sports modes (strike, running, mountain climbing, cycling, basketball, Swimming, badminton, football, elliptical machine, yoga, table tennis, skipping rope, tennis, baseball, rugby, hula hoop, golf, long jump, sit-ups, volleyball), sleep monitoring (sleep time, sleep quality), call notification, information Reminders, push notifications in multiple languages, alarm clock reminders, sedentary reminders, etc. 16. Size: 44.6x44.6x9.5mm 17. Weight: 38.6g