Weight[g] : 43 SIM Card Slot : Nano sim card Voice assistant built-in : no Bluetooth-compatible Version : 4.2 Wi-fi : YES Metrics measured : Heart Rate Monitor,Blood Oxygen Monitor,Blood Pressure Monitor,Body Temperature Monitor Activity Tracked : Steps Tracker,Distance Tracker,Calorie Tracker Touch Screen : YES Category : Smart Watches App name : Aladeng Screen Material : IPS Band Detachable : Yes APP Download Available : Yes Battery Detachable : No Resolution : HD Touch Screen Display Size : 1.54-inch 240*240 px Movement Type : Electronic Style : Fashion Application Age Group : Elder Screen Shape : Square Case Material : Carbon Fibre Band Material : Silica gel Waterproof Grade : Life Waterproof SIM Card Available : Yes Mechanism : Yes Multiple Dials : Yes GPS : Yes Network Mode : 4G Battery Capacity : >450mAh Rear Camera : 1.3MP RAM : 1GB ROM : 8GB System : Android Wear,Android OS Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,Turkish,ITALIAN,French,German,Korean,Japanese,Ukrainian,Hebrew,Dutch,Arabic,Indonesian,Greek Function : Passometer,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,Big Three Needles,24 hour instruction,Alarm Clock,Small Second,World Time,Permanent Calendar,Power Reserve,week,Month,Heart Rate Tracker,Interactive Music,Noctilucent,Thermometer,Calendar,Lighting,Countdown,Calculators,alarm Certification : CE,FCC,RoHS Additional Features : 2G,3G,4G,Alarm,GPS,People,Sound Recorder Battery : 750mAh Bulit-in Battery Frequency 2G,3G,4G : GSM850\900\1800\1900MHz&TDD-LTE1900/2300/2600 Wifi/GPS : Accuracy 5-50m OS : Android 9.0 Camera : Dual camera WI-FI : yes Music play : Support Video play : Support bluetooth : Support vibration reminder : Support Google play : Support whatsapp : Support Facebook : Support