Watch language: Chinese, English, Japanese, Polish, German, Russian, French, Spanish, Italian, Portuguese APK name: Da fit Battery: 200mah Normal use: 4-7 days Standby time: 15-25 daysdepending on personal use Display mode: 1.3 round screen 240 * 240 Touch screen: full touch Strap width: 22 mm Main function: Exercise tracking: distance/calories/steps/multi-sports mode Health tracking: heart rate monitoring/blood pressure monitoring/sleep monitoring Message notification: call, SMS, WeChat, QQ, Facebook, Twitter, WhatsApp, Line, Instagram, Snapchat, Skype, etc. Bluetooth function: Bluetooth camera control/Bluetooth music control Bluetooth call: caller/call history/ Other functions: Brightness/Alarm Clock/Sedentary Reminder/Find Phone/Find Watch/Weather/Raise your hand to brighten the screen Note: The measurement principle of wearable devices is completely different from that of medical devices. Only for sports and fitness reference, thank you.