Band width[mm] : 22 Weight[g] : 64 Voice assistant built-in : YES Bluetooth-compatible Version : 5.0 Wi-fi : no Metrics measured : Heart Rate Monitor,Blood Oxygen Monitor,Sleep Monitor,Blood Pressure Monitor,Blood Sugar Monitor,Body Temperature Monitor Activity Tracked : Steps Tracker,Distance Tracker,Calorie Tracker,Activity Tracker Touch Screen : YES Category : Smart Watches App name : HealthWear Screen Material : IPS CPU Model : RTL8762DW Band Detachable : No Battery Detachable : No Resolution : 320 * 386 Display Size : 1.91 inches Style : SPORT Application Age Group : Adult Screen Shape : Square Case Material : Alloy Band Material : Silica gel Waterproof Grade : Life Waterproof SIM Card Available : Yes Mechanism : No Multiple Dials : Yes GPS : No Network Mode : None Battery Capacity : 180-220mAh Rear Camera : None RAM : 128MB ROM : 128MB System : Proprietary OS Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,ITALIAN,French,German,Korean,Japanese Function : Passometer,fitness tracker,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,24 hour instruction,Chronograph,Alarm Clock,World Time,Power Reserve,week,Month,Heart Rate Tracker,Interactive Music,Noctilucent,Thermometer,Calendar,Countdown,Calculators,Oxymeter Certification : CE Compatible System : Android 4.4 and above; iOS 8.2 and above Battery Capcaity : 220mAh Charging Type : Magnetic charging (with short circuit protection) Shell Material : Alloy+PC+ABS+Medical 316 steel sheet