1. Touch screen specification: capacitor single touch control. 2. Resolution: 240X240. 3. Battery capacity: 200mAh. 4. System: iOS 8.0 or above, Android 4.4 or above, bluetooth 4.0. 5. Bracelet system language: Chinese, English. 6. APP support languages: Chinese, traditional Chinese, English, Japanese, Korean, German, Russian, Spanish, Italian, French, Vietnamese, Portuguese 7. Functions: blood pressure monitoring, heart rate monitoring, pedometer, exercise distance, calorie consumption, sleep test, screen raising, sedentary reminder, mobile phone search, multi-mode alarm clock reminder, running mode, female menstrual cycle reminder, message reminder.