Watch introduction:    Screen: 1.69" 240*280 Full Fit Full To-uch Battery: 220mAh Polymer Case Size: 43.0*36.0*9.8mmBluetooth: 4.0 Supported mobile phone version: iOS 9.0 and above Android 5.0 and above  feature:   Bluetooth calls make calls, receive calls, incoming calls/text messages, push notifications, and remind the APP that there are function enable switches (incoming calls, text messages, WeChat, QQ, Facebook, Twitter, LinkedIn, WhatsApp, Line, Instagram, Snapchat, Skype and other mobile applications) and events, etc. Such as sitting, alarm clock, drinking water, taking me-dicine and other information reminders, alarm clock, taking pictures, raising the wrist screen, sedentary reminder, stopwatch, countdown, searching for mobile phones, bracelet brightness adjustment, bracelet screen duration adjustment, step counting, heart rate data synchronization APP support, exercise, mileage, calories, steps, sleep, total sleep, deep and light sleep time, history, heart rate, blood pressure, sleep, exercise, walking, running, cycling, basketball, soccer, badminton, skipping, table tennis, tennis, baseball, yoga (11 kinds)   Watch language:   English, Chinese, Spanish, Portuguese, German, French, Russian, Italian, Thai, Dutch, Czech, Turkish, Malaysian, Slovak, Polish, Japanese (16 countries)  APP language:   Chinese, English, Chinese [Traditional], Japanese, Korean, French, German, Russian, Polish, Spanish, Portuguese, Dutch, Arabic, Czech, Greek, Hindi, Hungarian, Italian, Slovak, Turkish, Thai , Croatia (22 countries)