1. System requirements: Android 4.4 and above, IOS 9.0 or above2. Bluetooth version: BLE 4.03. Memory: 64M4. Battery capacity: 180 mAh5. Waterproof rating: IP676. APP Support Language: (Simplified, Traditional) English7. Bracelet support language Simplified Chinese, English.8. Charging method: magnetic charging9. Heart rate detection,pressure detection (heart rate monitoring),time/clock display, step, calories, distance, sleep time, photo, power on/off display (five dial display)10. Standard sports function (step, distance, calories) multi-sports mode (climbing, walking, basketball, running, table tennis, cycling, swimming, badminton, football)11. Sleep monitoring (sleep time, sleep quality, day and night time)12. Find your phone and find the bracelet, call reminder, SMS reminder, QQ reminder, WeChat reminder, Skype, facebook, whatsApp reminder. (Message shows 50 fonts)13. Alarm clock / medication / meeting / sedentary / drinking water reminder14. Size 44.7mm diameter, 11.6mm thick