Item model number: E400 Battery: 280mAH Display: 1.39-inch 360 x 360 high-definition touch screen PPG sensor chip: SFH2201 ECG chip: TYHX3220 Heart Rate: Green Light PPG Waterproof: IP68 Battery: 280mAH APP name: H Band Standby time: 30 days Daily battery life: 4-7 days Bluetooth: Bluetooth 5.1 (above Android5.0, above IOS9.0) Touch: full touch screen (full fit screen) Charging method: USB magnetic 2pin charging cable (with protection) Weight: Body 55g (including strap) Specifications: Main Features: x Health Monitor: Sleep monitoring, heart rate, blood pressure, sitting reminders, drinking reminders, blood oxygen, blood sugar,Body Temperature x Sports Modes: Sports steps, sports mileage record, card road consumption, a variety of sports modes. Movement track (mobile APP display) x Other functions: Mute alarm clock, remote photo, music control, sedentary reminder, drink water reminder, weather display, wrist light screen, call reminder, SMS reminder, countdown, shake to take photos, mobile phone search, etc Compatible System: Android 5.0 and above, Apple IOS 9.0 and above,Bluetooth 5.1 Language: x Watch Language: Russian, Hungarian, Turkish, German, Italian, Czech, Slovak, Japanese, French, Polish, Persian, simplified Chinese, traditional Chinese, English, Portuguese, Spanish, Vietnamese, Arabic, Korean x APP Language: Chinese, Korean, Japanese, English, German, French, Italian, Spanish, Portuguese (Portuguese), Russian, Hungarian, Turkish, Indonesian, Polish, Czech, Greek, Swedish Package Included: 1 x Smart Watch 1 x Charging cable 1 x User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.